The expansion is a part of Fidelity's partnership with asset manager BlackRock Inc, the company said https://bit.ly/2BzXqu6 in a statement.

Poor performance of asset managers towards the end of 2018 prompted investors to withdraw cash from actively managed institutional funds in the fourth quarter, but people parked record cash in the company's low-cost exchange traded funds.

Earlier in the day, another investment manager, Schwab, said it would also double its ETF lineup and add iShares ETFs to its offering.

Schwab clients will be able to buy and sell 503 ETFs, starting March 1, the company said in a statement.

Fidelity has more than $6.7 trillion of assets under management, including $380 billion in ETF assets, and currently serves more than 13,000 institutions.

The platform will offer ETFs from over ten asset managers, including iShares ETFs.

(Reporting by Bharath Manjesh and Diptendu Lahiri in Bengaluru; Editing by James Emmanuel and Anil D'Silva)