The following discussion should be read in conjunction with the unaudited condensed consolidated financial statements and the related notes in Item 1, included elsewhere in this report. In addition to historical information, the following discussion also contains forward-looking statements that include risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors, including those set forth under the heading "Risk Factors" in our Annual Report on Form 10-K filed with the Securities Exchange Commission ("SEC") on March 1, 2021 and elsewhere in this report.

When we use the terms "we," "us," and "our," we mean IBG, Inc. and its subsidiaries for the periods presented.

Introduction

Interactive Brokers Group, Inc. (the "Company" or "IBG, Inc.") is a holding company whose primary asset is its ownership of approximately 21.8% of the membership interests of IBG LLC. The remaining approximately 78.2% of IBG LLC membership interests are held by IBG Holdings LLC ("Holdings"), a holding company that is owned by our founder and Chairman, Mr. Thomas Peterffy and his affiliates, management and other employees of IBG LLC, and certain other members. The table below shows the amount of IBG LLC membership interests held by IBG, Inc. and Holdings as of March 31, 2021.



                       IBG, Inc.     Holdings        Total
 Ownership %               21.8%        78.2%       100.0%

Membership interests 90,830,444 325,960,034 416,790,478

We are an automated global electronic broker. We custody and service accounts for hedge and mutual funds, exchange traded funds ("ETFs"), registered investment advisers, proprietary trading groups, introducing brokers and individual investors. We specialize in routing orders and executing and processing trades in stocks, options, futures, forex, bonds, mutual funds and ETFs on more than 135 electronic exchanges and market centers in 33 countries and in 25 currencies seamlessly around the world.

As an electronic broker, we execute, clear and settle trades globally for both institutional and individual customers. Capitalizing on our proprietary technology, our systems provide our customers with the capability to monitor multiple markets around the world simultaneously and to execute trades electronically in these markets at a low cost, in multiple products and currencies from a single trading account. The emerging complexity of multiple market centers has provided us with the opportunity to build and continuously adapt our order routing software to secure excellent execution prices.

Since our inception in 1977, we have focused on developing proprietary software to automate broker-dealer functions. The proliferation of electronic exchanges and market centers over the last three decades has allowed us to integrate our software with an increasing number of trading venues into one automatically functioning, computerized platform that requires minimal human intervention.

Our customer base is diverse with respect to geography and segments. Currently, approximately 74% of our customers reside outside the U.S. in over 200 countries and territories, and over 50% of new customers come from outside the U.S. Approximately 64% of our customers' equity is in institutional accounts such as hedge funds, financial advisors, proprietary trading desks and introducing brokers. Specialized products and services that we have developed successfully attract these accounts. For example, we offer prime brokerage services, including financing and securities lending, to hedge funds; our model portfolio technology and automated share allocation and rebalancing tools are particularly attractive to financial advisors; and our trading platform, global access and low pricing attract introducing brokers.

COVID-19 Pandemic

In March 2020, the World Health Organization recognized the outbreak of the Coronavirus Disease 2019 ("COVID-19") caused by a novel strain of the coronavirus as a pandemic. The pandemic affects all countries in which we operate. The response of governments and societies to the COVID-19 pandemic, which includes temporary closures of certain businesses; social distancing; travel restrictions, "shelter in place" and other governmental regulations; and reduced consumer spending due to job losses, has significantly impacted volatility in the financial, commodities and energy markets, and general economic conditions.

The COVID-19 pandemic has precipitated unprecedented market conditions with equally unprecedented social and community challenges. Amid these challenges:

?The Company is committed to ensuring the highest levels of service to its customers so they can effectively manage their assets, portfolios and risks. The Company's technical infrastructure has withstood the challenges presented by the extraordinary volatility and increased market volume.



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?The Company can run its business from alternate office locations and/or remotely if a Company office must temporarily close due to the spread of the COVID-19 pandemic.

The effects of the COVID-19 pandemic on the Company's financial results for the quarter ended March 31, 2021 can be summarized as follows: (1) higher commission revenue due to increased trading activity and a higher rate of customer accounts opened; and (2) lower net interest income resulting from lower benchmark interest rates.

The impact of the COVID-19 pandemic on the Company's future financial results remains uncertain and currently cannot be quantified, as it will depend on numerous evolving factors that currently cannot be accurately predicted, including, but not limited to, the duration and spread of the pandemic; its impact on our customers, employees and vendors; governmental actions in response to the pandemic; and the overall impact of the pandemic in the economy and society; among other factors. Any of these events could have a materially adverse effect on the Company's financial results.

Business Environment

During the quarter ended March 31, 2021 ("current quarter"), world equities markets were up strongly versus the pandemic-impacted quarter ended March 31, 2020 ("prior year quarter"). Global interest in securities markets and a search for yield in zero and negative-interest rate environments, especially by individuals newly attracted to these markets, led to highly active trading.

The following is a summary of the key economic drivers that affect our business and how they compared to the prior year quarter:

Global trading volumes. According to industry data, compared to the prior year quarter, average daily volumes in U.S. exchange-listed equity-based options increased by 50%, and in U.S. listed cash equities by 32%, while U.S. futures volume decreased by 19%. Many markets experienced significant increases in trading activity, even with moderate volatility throughout the quarter, as a growing number of investors participated out of a desire to earn higher yields on assets than could be achieved in bank accounts in a zero or negative rate environment.

These factors boosted industry and Company transaction revenues, especially in stocks and options. Note that while options, futures and U.S. cash equities volumes are readily comparable measures, they reflect most but not all of the global volumes that generate our commission revenue. See "Trading Volumes and Customer Statistics" below in this Item 2 for additional details regarding our trade volumes, contract and share volumes, and customer statistics.

Volatility. U.S. market volatility, as measured by the average Chicago Board Options Exchange Volatility Index ("VIX®"), fell 24% to 23, versus 31in the prior year quarter, as last year's COVID-19 pandemic-induced spike in market volatility waned.

Higher volatility improves our performance because it generally correlates with customer trading activity across product types. Customer options and stock volumes were up 72% and 411%, respectively, while futures and foreign exchange dollar volumes declined 17% and 18% respectively, compared to the prior year quarter. While our customer stock volume reflected unusually strong trading in low-priced stocks, even after removing that effect the increase in share volume was a robust 134%. Despite this quarter's lower average volatility than the prior year quarter, investors sought to utilize their time productively by opening brokerage accounts while at home during the COVID-19 pandemic. This trend, combined with the increasing connectedness of investors to one another and to the markets, led to an influx of new accounts and strong increases in trading volume.

Interest Rates. The U.S. Federal Reserve's target federal funds rate range in the current quarter remained at zero to 0.25%, similar to rates in many other currencies, with the exception of those where rates are negative. Low benchmark rates lead to lower net interest income and a narrower net interest margin.

U.S. rates also continue to exhibit a relatively flat yield curve, which limits our opportunities to earn more net interest income on interest-sensitive assets. Low rates reduce the interest we earn on our segregated cash, the majority of which is invested in U.S. government securities and related instruments, as higher-yielding investments mature and are reinvested at current lower rates. Further, our margin balances are tied to benchmark rates, with a minimum charge of 0.75% in U.S. dollars, so low interest rates limit the interest we receive on margin lending to our customers. We continue to offer among the lowest rates in the industry on margin lending, and we believe our low rates are an important factor that attracts customers to our platform.

As an offset, lower rates also reduce our interest expense, for example in U.S. dollars we pay interest to customers only when the federal funds effective rate is above 0.50%. In currencies with negative rates, we collect interest on a portion of customer cash balances. And as an indirect positive effect, we believe low and negative benchmark world interest rates have been a factor leading to the active trading we experienced, as investors sought to enter securities markets to achieve higher yields on their investments.



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Net interest income increased compared to the prior year quarter as the average federal funds effective rate decreased to 0.08% from 1.25% in the prior year quarter. While the interest we pay on customer cash balances and earn on customer margin loans is based on spreads that are compressed at low benchmark rates, rising balances have partially compensated for this reduction in net interest income. Despite the collapse in benchmark rates, a 47% increase in our average margin loan balances, compared to the prior year quarter, contributed to a comparatively smaller 16% decline in margin loan interest from the prior year quarter. Average customer credit balances rose 33% over the prior year quarter, driven by a strong inflow of new accounts worldwide, sustaining a historical trend whereby growth in our clients' cash has been consistent and over time outpaces the variable growth and contraction in margin loans.

Fueled by higher average balances and strong securities lending results, our net interest income grew 18% in the current quarter over the prior year quarter, though our overall net interest margin declined from 1.45% to 1.26%, primarily due to lower yields on our segregated cash and securities and on our margin loan balances.

Currency fluctuations. As a global electronic broker trading on exchanges around the world in multiple currencies, we are exposed to foreign currency risk. We actively manage this exposure by keeping our net worth in proportion to a defined basket of 10 currencies we call the "GLOBAL" to diversify our risk and to align our hedging strategy with the currencies that we use in our business. Because we report our financial results in U.S. dollars, the change in the value of the GLOBAL versus the U.S. dollar affects our earnings. During the current quarter the value of the GLOBAL, as measured in U.S. dollars, decreased 0.84% compared to its value as of December 31, 2020, which had a negative impact on our comprehensive earnings for the current quarter.

Overall, active markets, stay-at-home conditions, and a search for higher yields in negative and zero rate environments, brought on by the COVID-19 pandemic and government responses to it, have continued to encourage people to actively engage in the markets. Customers continue to seek our superior technology, execution capabilities, and our ability to offer a broad range of products and global market access.

A discussion of our approach for managing foreign currency exposure is contained in Part I, Item 3 of this Quarterly Report on Form 10-Q entitled "Quantitative and Qualitative Disclosures about Market Risk.

Financial Overview

We report non-GAAP financial measures, which exclude certain items that may not be indicative of our core operating results and business outlook and may be useful in evaluating the operating performance of our business and provide a better comparison of our results in the current period to those in prior and future periods. See the "Non-GAAP Financial Measures" section below in this Item 2 for additional details.

Diluted earnings per share were $1.16 for the current quarter, compared to diluted earnings per share of $0.60 for the prior year quarter. Adjusted diluted earnings per share were $0.98 for the current quarter and $0.69 for the prior year quarter. The calculation of diluted earnings per share is detailed in Note 4 - "Equity and Earnings per Share" to the unaudited condensed consolidated financial statements in Part 1, Item 1 of this Quarterly Report on Form 10-Q.

For the current quarter, our net revenues were $893 million and income before income taxes was $639 million, compared to net revenues of $532 million and income before income taxes of $308 million in the prior year quarter. Adjusted net revenues were $796 million and adjusted income before income taxes was $542 million, compared to adjusted net revenues of $581 million and adjusted income before income taxes of $357 million in the prior year quarter.

The financial highlights for the current quarter were:

?Commission revenue showed strong growth, increasing $143 million, or 53%, from the prior year quarter on higher customer trading volume within an active trading environment worldwide.

?Net interest income increased $49 million, or 19%, from the prior year quarter on strong securities lending activity, tempered by a decrease in the average Federal Funds effective rate to 0.08% from 1.25% in the prior year quarter, which reduced earnings on segregated customer cash and margin lending.

?Other income increased $151 million from the prior year quarter. This increase was mainly comprised of $107 million related to our strategic investment in Up Fintech Holding Limited ("Tiger Brokers"), which swung to a $99 million mark-to-market gain in the current quarter from an $8 million mark-to-market loss in the prior year quarter; and $47 million related to our currency diversification strategy, which lost $2 million in the current quarter compared to a loss of $49 million in the prior year quarter.



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?General and administrative expenses increased $22 million from the prior year quarter, led by $19 million in additional costs for Brexit-related regulatory onboarding to bring our new brokerage operations on line in Europe.

?Pretax profit margin was 72% for the current quarter, up from 58% in the prior year quarter. Adjusted pretax profit margin for the current quarter was 68%, up from 61% in the prior year quarter.

?Total equity at March 31, 2021 was $9.4 billion.

Because we report our financial results in U.S. dollars, the change in the value of the GLOBAL versus the U.S. dollar affects our earnings. In connection with our currency diversification strategy as of March 31, 2021, approximately 26% of our equity was denominated in currencies other than the U.S. dollar. In the current quarter, our currency diversification strategy decreased our comprehensive earnings by $78 million (compared to a decrease of $87 million in the prior year quarter), as the U.S. dollar value of the GLOBAL decreased by approximately 0.84%, compared to its value as of December 31, 2020. The effects of our currency diversification strategy are reported as (1) a component of other income (loss of $2 million) in the consolidated statement of comprehensive income and (2) other comprehensive income ("OCI") (loss of $76 million) in the consolidated statement of financial condition and the consolidated statement of comprehensive income. The full effect of the GLOBAL is captured in comprehensive income.

Certain Trends and Uncertainties

We believe that our current operations may be favorably or unfavorably impacted by the following trends that may affect our financial condition and results of operations:

?The COVID-19 pandemic has precipitated unprecedented market conditions with equally unprecedented social and community challenges. The impact of the COVID-19 pandemic on the Company's future financial results could be significant but currently cannot be quantified, as it will depend on numerous evolving factors that currently cannot be accurately predicted, including, but not limited to the duration and spread of the pandemic; its impact on our customers, employees and vendors; governmental regulations in response to the pandemic; and the overall impact of the pandemic on the economy and society; among other factors.

•Retail participation in the equity markets has fluctuated over the past few years due to investor sentiment, market conditions and a variety of other factors. Retail transaction volumes may not be sustainable and are not predictable.

?Additional consolidation among market centers may adversely affect the value of our IB SmartRoutingSM software.

•Benchmark interest rates have fluctuated over the past years due to economic conditions. Changes in interest rates may not be predictable.

?Fiscal and/or monetary policy may change and impact the financial services business and securities markets.

?Price competition among broker-dealers may continue to intensify.

•Scrutiny of equity and options market makers, hedge funds, and soft dollar and payment for order flow practices by regulatory and legislative authorities has increased. New legislation or modifications to existing regulations and rules could occur in the future.

•Our remaining market making activities will continue to be impacted by market structure changes, market conditions, the level of automation of competitors, and the relationship between actual and implied volatility in the equities markets.

See "Risk Factors" in Part I, Item 1A of our Annual Report on Form 10-K, filed with the SEC on March 1, 2021, and elsewhere in this report for a discussion of other risks that may affect our financial condition and results of operations.




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Trading Volumes and Customer Statistics

The tables below present historical trading volumes and customer statistics for our business. Trading volumes are the primary driver in our business. Information on our net interest income can be found elsewhere in this report.



TRADE VOLUMES:

(in thousands, except %)

                           Brokerage
        Brokerage                Non                                               Avg. Trades
          Cleared       %    Cleared       %  Principal       %     Total       %     per U.S.
Period     Trades  Change     Trades  Change     Trades  Change    Trades  Change  Trading Day
2018     328,099             21,880             18,663           368,642                1,478
2019     302,289     (8%)    26,346      20%    17,136     (8%)  345,771     (6%)       1,380
2020     620,405     105%    56,834     116%    27,039      58%  704,278     104%       2,795

1Q2020   128,564             11,373              4,879           144,816                2,336
1Q2021   273,985     113%    24,079     112%     8,418      73%  306,482     112%       5,024

4Q2020    178,614             17,008              7,455           203,077                3,223
1Q2021    273,985     53%     24,079     42%      8,418     13%   306,482     51%        5,024


CONTRACT AND SHARE VOLUMES:

(in thousands, except %)

TOTAL

            Options       %  Futures (1)       %        Stocks       %
Period  (contracts)  Change  (contracts)  Change      (shares)  Change
2018       408,406              151,762           210,257,186
2019       390,739     (4%)     128,770    (15%)  176,752,967    (16%)
2020       624,035      60%     167,078      30%  338,513,068      92%

1Q2020     138,206               49,204            62,298,036
1Q2021     231,797      68%      40,868    (17%)  308,934,824     396%

4Q2020     170,191               35,295           121,062,599
1Q2021     231,797      36%      40,868      16%  308,934,824     155%


ALL CUSTOMERS

            Options       %  Futures (1)       %        Stocks       %
Period  (contracts)  Change  (contracts)  Change      (shares)  Change
2018       358,852              148,485           198,909,375
2019       349,287     (3%)     126,363    (15%)  167,826,490    (16%)
2020       584,195      67%     164,555      30%  331,263,604      97%

1Q2020     128,842               48,437            59,897,045
1Q2021     221,898      72%      40,361    (17%)  306,165,385     411%

4Q2020     160,953               34,851           119,654,910
1Q2021     221,898      38%      40,361      16%  306,165,385     156%


_________________________

(1)Futures contract volume includes options on futures.




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CLEARED CUSTOMERS

            Options       %  Futures (1)       %        Stocks       %
Period  (contracts)  Change  (contracts)  Change      (shares)  Change
2018       313,795              146,806           194,012,882
2019       302,068     (4%)     125,225    (15%)  163,030,500    (16%)
2020       518,965      72%     163,101      30%  320,376,365      97%

1Q2020     112,916               47,979            57,653,853
1Q2021     202,583      79%      40,019    (17%)  301,675,030     423%

4Q2020     144,378               34,459           116,538,527
1Q2021     202,583      40%      40,019      16%  301,675,030     159%


PRINCIPAL TRANSACTIONS

            Options       %  Futures (1)       %       Stocks       %
Period  (contracts)  Change  (contracts)  Change     (shares)  Change
2018        49,554                3,277           11,347,811
2019        41,452    (16%)       2,407    (27%)   8,926,477    (21%)
2020        39,840     (4%)       2,523       5%   7,249,464    (19%)

1Q2020       9,364                  767            2,400,991
1Q2021       9,899       6%         507    (34%)   2,769,439      15%

4Q2020       9,238                  444            1,407,689
1Q2021       9,899       7%         507      14%   2,769,439      97%


________________________

(1)Futures contract volume includes options on futures.

CUSTOMER STATISTICS:



Year over Year                                    1Q2021    1Q2020   % Change
Total Accounts (in thousands)                      1,325       760        74%
Customer Equity (in billions) (1)                $ 330.6   $ 160.7       106%

Cleared DARTs (in thousands) (2)                   2,964     1,301       128%
Total Customer DARTs (in thousands) (2)            3,308     1,454       128%

Cleared Customers Commission per Cleared Commissionable Order (3) $ 2.31 $ 3.30 (30%) Cleared Avg. DART per Account (Annualized)

           622       453        37%

Net Revenue per Avg. Account (Annualized) $ $2,610 $ $3,069 (15%)




Consecutive Quarters                              1Q2021    4Q2020   % Change
Total Accounts (in thousands)                      1,325     1,073        23%
Customer Equity (in billions) (1)                $ 330.6   $ 288.6        15%

Cleared DARTs (in thousands) (2)                   2,964     1,871        58%
Total Customer DARTs (in thousands) (2)            3,308     2,109        57%

Cleared Customers Commission per Cleared Commissionable Order (3) $ 2.31 $ 2.46 (6%) Cleared Avg. DART per Account (Annualized)

           622       459        36%

Net Revenue per Avg. Account (Annualized) $ $2,610 $ $2,151 21%




________________________

(1)Excludes non-customers.

(2)Daily average revenue trades ("DARTs") are based on customer orders.

(3)Commissionable order - a customer order that generates commissions.



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Results of Operations

The table below presents our consolidated results of operations for the periods indicated. The period-to-period comparisons below of financial results are not necessarily indicative of future results.



                                                       Three Months Ended March 31,
                                                          2021               2020

                                                    (in millions, except share and per
                                                              share amounts)
Revenues
Commissions                                         $            412    $          269
Other fees and services                                           56                38
Other income (loss)                                              120               (31)
Total non-interest income                                        588               276

Interest income                                                  390               369
Interest expense                                                 (85)             (113)
Total net interest income                                        305               256
Total net revenues                                               893               532

Non-interest expenses
Execution, clearing and distribution fees                         68                77
Employee compensation and benefits                                97                80
Occupancy, depreciation and amortization                          20                17
Communications                                                     8                 6
General and administrative                                        59                37
Customer bad debt                                                  2                 7
Total non-interest expenses                                      254               224
Income before income taxes                                       639               308
Income tax expense                                                53                18
Net income                                                       586               290
Less net income attributable to noncontrolling
interests                                                        479               244
Net income available for common stockholders        $            107    $           46

Earnings per share
Basic                                               $            1.18   $          0.60
Diluted                                             $            1.16   $          0.60

Weighted average common shares outstanding
Basic                                                     90,789,321        76,751,168
Diluted                                                   91,766,142        77,568,464

Comprehensive income
Net income available for common stockholders        $             107   $            46
Other comprehensive income
Cumulative translation adjustment, before income
taxes                                                            (17)               (7)
Income taxes related to items of other
comprehensive income                                                -                 -
Other comprehensive loss, net of tax                             (17)               (7)
Comprehensive income available for common
stockholders                                        $              90   $            39

Comprehensive income attributable to
noncontrolling interests
Net income attributable to noncontrolling
interests                                           $             479   $           244
Other comprehensive income - cumulative
translation adjustment                                           (59)              (31)
Comprehensive income attributable to
noncontrolling interests                            $             420   $           213



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Three Months Ended March 31, 2021 ("current quarter") compared to the Three Months Ended March 31, 2020 ("prior year quarter")

Net Revenues

Total net revenues, for the current quarter, increased $361 million, or 68%, compared to the prior year quarter, to $893 million. The increase in net revenues was due to higher commissions, other income, other fees and services, and net interest income.

Commissions

We earn commissions from our cleared customers for whom we act as an executing and clearing broker and from our non-cleared customers for whom we act as an execution-only broker. We have a commission structure that allows customers to choose between an all-inclusive fixed, or "bundled", rate and a tiered, or "unbundled", rate that offers lower commissions for high volume customers. For "unbundled" commissions, we pass through regulatory and exchange fees separately from our commissions, adding transparency to our fee structure. Commissions also include payments for order flow income received from IBKR LiteSM liquidity providers. (Our IBKR LiteSM offering provides commission-free trades on U.S. exchange-listed stocks and ETFs and generates no commission revenues from customers on these trades.) Our commissions are geographically diversified.

Commissions, for the current quarter, increased $143 million, or 53%, compared to the prior year quarter, to $412 million, driven by significantly higher customer trading volumes, particularly in stocks and options. Total customer options contracts and stock share volumes increased 72% and 411%, respectively, while futures contracts decreased 17% compared to the prior year quarter. Removing the effect of trading in low-priced stocks, the stock share volume rose 134%. Total DARTs for cleared and execution-only customers, for the current quarter, increased 128% to 3.3 million, compared to 1.5 million for the prior year quarter. DARTs for cleared customers, i.e., customers for whom we execute trades, as well as clear and carry positions, for the current quarter, increased 128% to 3.0 million, compared to 1.3 million for the prior year quarter. Average commission per commissionable order for cleared customers, for the current quarter, decreased 30% to $2.31, compared to $3.30 for the prior year quarter, reflecting smaller average order sizes in options, futures and foreign exchange as well as higher exchange rebates passed through to our customers.

Other Fees and Services

We earn fee income on services provided to our customers, which includes market data fees, risk exposure fees, minimum activity fees, payments for order flow from exchange-mandated programs, and other fees and services charged to customers.

Other fees and services, for the current quarter, increased $18 million, or 47%, compared to the prior year quarter, to $56 million, driven by a $7 million increase in IPO-related fee income, a $6 million increase in market data fee income, and a $3 million increase in payments for order flow income from options exchange-mandated programs; partially offset by a $2 million decrease in FDIC Insured Bank Deposit Sweep Program fee income.

Other Income

Other income consists of foreign exchange gains (losses) from our currency diversification strategy, gains (losses) from principal transactions, gains (losses) from our equity method investments, and other revenue not directly attributable to our core business offerings. A discussion of our approach to managing foreign currency exposure is contained in Part I, Item 3 of this Quarterly Report on Form 10-Q entitled "Quantitative and Qualitative Disclosures about Market Risk."

Other income, for the current quarter, increased $151 million, compared to the prior year quarter, to $120 million. This increase was mainly comprised of $107 million related to our strategic investment in Tiger Brokers, which swung to a $99 million mark-to-market gain in the current quarter from an $8 million mark-to-market loss in the prior year quarter and $47 million related to our currency diversification strategy, which lost $2 million in the current quarter compared to a loss of $49 million in the prior year quarter.

Interest Income and Interest Expense

We earn interest on margin lending to customers secured by marketable securities these customers hold with us; from our investments in U.S. and foreign government securities; from borrowing and lending securities; and on deposits (in positive interest rate currencies) with banks. We pay interest on cash balances (in sufficiently positive interest rate currencies) customers hold with us; for borrowing and lending securities; and on our borrowings.

Net interest income (interest income less interest expense), for the current quarter, increased $49 million, or 19%, compared to the prior year quarter, to $305 million. The increase in net interest income was driven by strong securities lending activity, tempered by a decrease in the average Federal Funds effective rate, which reduced earnings on segregated customer cash and margin lending.



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Net interest income on customer balances, for the current quarter, decreased $48 million, compared to the prior year quarter, driven by a decrease in the average federal funds effective rate to 0.08% from 1.25% in the prior year quarter. See the "Business Environment" section above in this Item 2 for a further discussion about the change in interest rates in the current quarter.

We earn income on securities loaned and borrowed to support customer long and short stock holdings in margin accounts. In addition, our Stock Yield Enhancement Program provides an opportunity for customers with fully-paid stock to allow us to lend it out. We pay customers a rebate on the cash collateral generally equal to 50% of the income we earn from lending the shares. At March 31, 2021, we placed cash and/or U.S. Treasury securities as collateral securing the loans in the customer's account, held in segregated accounts or at an affiliate acting as collateral agent for the benefit of the customer.

In the current quarter, average securities borrowed increased 34%, to $5.1 billion and average securities loaned increased 145%, to $11.1 billion, compared to the prior year quarter. Net interest earned from securities lending is affected by the level of demand for securities positions held by our customers that investors were looking to sell short. During the current quarter, net interest earned from securities lending transactions increased $113 million, or 182%, compared to the prior year quarter, as we were able to satisfy investor demand for more of the hard-to-borrow securities they sought to sell short. It should be noted that securities lending transactions entered into to support customer activity may produce interest income (expense) that is offset by interest expense (income) related to customer balances.

The Company measures return on interest-earning assets using net interest margin ("NIM"). NIM is computed by dividing the annualized net interest income by the average interest-earning assets for the period. Interest-earning assets consist of cash and securities segregated for regulatory purposes (including U.S. government securities and securities purchased under agreements to resell), customer margin loans, securities borrowed, other interest-earning assets (solely firm assets), and customer cash balances swept into FDIC insured banks as part of our Insured Bank Deposit Sweep Program. Interest-bearing liabilities consist of customer credit balances, securities loaned, and other interest-bearing liabilities.

Yields are generally a reflection of benchmark interest rates in each currency in which the Company and its customers hold cash balances. Because a substantial portion of customer cash and margin loans are denominated in currencies other than the U.S. dollar, changes in U.S. benchmark interest rates do not impact the total amount of segregated cash and securities, customer margin loans and customer credit balances. Furthermore, because interest, when benchmark rates are at higher levels, is paid only on eligible cash credit balances (i.e., balances over $10 thousand or equivalent, in securities accounts with over $100 thousand in equity, and in smaller accounts at reduced rates), changes in benchmark interest rates are not passed through to the total amount of customer credit balances. Finally, the Company's policies with respect to currencies with negative interest rates impact the yields on segregated cash and customer credit balances as effective interest rates in those currencies fluctuate.

Generally, as benchmark interest rates rise, a larger portion of the interest earned on securities lending transactions is reported as net interest income on "Segregated cash and securities, net" instead of "Securities borrowed and loaned, net" because interest earned on cash collateral held in specially designated bank accounts for the benefit of customers, in accordance with the U.S. customer protection rules, increases.




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The table below presents net interest income information corresponding to
interest-earning assets and interest-bearing liabilities for the periods
indicated.

                                           Three Months Ended March 31,
                                            2021                      2020

                                                   (in millions)
Average interest-earning assets
Segregated cash and securities        $         46,726              $ 33,864
Customer margin loans                           39,964                27,096
Securities borrowed                              5,108                 3,816
Other interest-earning assets                    5,416                 5,668
FDIC sweeps 1                                    2,817                 2,532
                                      $        100,031              $ 72,976

Average interest-bearing liabilities
Customer credit balances              $         77,887              $ 58,499
Securities loaned                               11,117                 4,529
Other interest-bearing liabilities                 138                   618
                                      $         89,142              $ 63,646

Net Interest income
Segregated cash and securities, net   $               2             $    106
Customer margin loans 2                             117                  139
Securities borrowed and loaned, net                 175                   62
Customer credit balances, net 2                      9                   (69)
Other net interest income 1,3                        9                    26
Net interest income 3                 $            312              $    264

Net interest margin ("NIM")                       1.26%                 1.45%

Annualized Yields
Segregated cash and securities                    0.02%                 1.26%
Customer margin loans                             1.19%                 2.06%
Customer credit balances                         -0.05%                 0.47%


______________________________

(1)Represents the average amount of customer cash swept into FDIC-insured banks as part of our Insured Bank Deposit Sweep Program. This item is not recorded in the Company's condensed consolidated statements of financial condition. Income derived from program deposits is reported in other net interest income in the table above. ?

(2)Interest income and interest expense on customer margin loans and customer credit balances, respectively, are calculated on daily cash balances within each customer's account on a net basis, which may result in an offset of balances across multiple account segments (e.g., between securities and commodities segments).

(3)Includes income from financial instruments that has the same characteristics as interest, but is reported in other fees and services and other income in the Company's condensed consolidated statements of comprehensive income. For the three months ended March 31, 2021 and 2020, $8 million and $4 million were reported in other fees and services, respectively, and -$1 million and $4 million were reported in other income, respectively. ?

Non-Interest Expenses

Non-interest expenses, for the current quarter, increased $30 million, or 13%, compared to the prior year quarter, to $254 million, mainly due to a $22 million increase in general and administrative expenses, a $17 million increase in employee compensation and benefits, a $3 million increase in occupancy expenses, and a $2 million increase in communications expense; partially offset by a $9 million decrease in execution, clearing and distribution fees, and a $5 million decrease in customer bad debt expense. As a percentage of total net revenues, non-interest expenses were 28% for the current quarter and 42% for the prior year quarter.




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Execution, Clearing and Distribution Fees

Execution, clearing and distribution fees include the costs of executing and clearing trades, net of liquidity rebates received from various exchanges and market centers, as well as regulatory fees and market data fees. Execution fees are paid primarily to electronic exchanges and market centers on which we trade. Clearing fees are paid to clearing houses and clearing agents. Market data fees are paid to third parties to receive streaming price quotes and related information.

Execution, clearing and distribution fees, for the current quarter, decreased $9 million, or 12%, compared to the prior year quarter, to $68 million, driven by a $32 million decrease in exchange fees, due to higher offsetting volume-related liquidity rebates received from certain exchanges; partially offset by an $11 million increase in regulatory transaction fees; a $6 million increase in clearing and depository fees; and a $5 million increase in market data fees.

Employee Compensation and Benefits

Employee compensation and benefits include salaries, bonuses and other incentive compensation plans, group insurance, contributions to benefit programs and other related employee costs.

Employee compensation and benefits expenses, for the current quarter, increased $17 million, or 21%, compared to the prior year quarter, to $97 million, associated with a 26% increase in the average number of employees to 2,110 for the current quarter, compared to 1,673 for the prior year quarter. We continued to add staff in customer service, compliance, and software development. As we continue to grow, our focus on automation has allowed us to maintain a relatively small staff. As a percentage of total net revenues, employee compensation and benefits expenses were 11% for the current quarter and 15% for the prior year quarter.

Occupancy, Depreciation and Amortization

Occupancy expenses consist primarily of rental payments on office and data center leases and related occupancy costs, such as utilities. Depreciation and amortization expenses result from the depreciation of fixed assets, such as computing and communications hardware, as well as amortization of leasehold improvements and capitalized in-house software development.

Occupancy, depreciation and amortization expenses, for the current quarter, increased $3 million, or 18%, compared to the prior year quarter, to $20 million, mainly due to higher costs related to the expansion of our physical space for both offices and data centers. As a percentage of total net revenues, occupancy, depreciation and amortization expenses were 2% for the current quarter and 3% for the prior year quarter.

Communications

Communications expenses consist primarily of the cost of voice and data telecommunications lines supporting our business, including connectivity to exchanges and market centers around the world.

Communications expenses, for the current quarter, increased $2 million compared to the prior year quarter, to $8 million.

General and Administrative

General and administrative expenses consist primarily of advertising; professional services expenses, such as legal and audit work; legal and regulatory matters; and other operating expenses.

General and administrative expenses, for the current quarter, increased $22 million, or 59%, compared to the prior year quarter, to $59 million, primarily due to $19 million in additional costs for Brexit-related regulatory onboarding to bring our new brokerage operations on line in Europe. As a percentage of total net revenues, general and administrative expenses were 7% for both the current quarter and the prior year quarter.

Customer Bad Debt

Customer bad debt expense consists primarily of losses incurred by customers in excess of their assets with us, net of amounts recovered by us.

Customer bad debt expense, for the current quarter, decreased $5 million, compared to the prior year quarter, to $2 million.




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Income Tax Expense

We pay U.S. federal, state and local income taxes on our taxable income, which is proportional to the percentage we own of IBG LLC. Also, our operating subsidiaries are subject to income tax in the respective jurisdictions in which they operate.

Income tax expense, for the current quarter, increased $35 million, or 194%, compared to the prior year quarter, to $53 million, primarily due to (1) higher income tax expense attributable to our operating subsidiaries outside the United States ("U.S."), driven by higher income before taxes and an additional $6 million expense related to the consolidation of European operations in the aftermath of Brexit; and (2) higher U.S. income tax expense driven by higher income before taxes and IBG, Inc.'s higher ownership percentage of IBG LLC which rose from 18.5% to 21.8%.

The table below presents information about our income tax expense for the periods indicated.

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