(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window.)

*

Fed hikes, recession fears in focus

*

L3Harris slides after $4.7 bln Aerojet buyout Indexes down: Dow 0.49%, S&P 0.90%, Nasdaq 1.49%

*

Dec 19 (Reuters) - Wall Street closed lower on Monday for a fourth straight session with Nasdaq leading declines as investors shied away from riskier bets, worried the Federal Reserve's tightening campaign could push the U.S. economy into a recession.

The three major U.S. stock indexes have been under pressure since Wednesday, when Fed Chair Jerome Powell took a hawkish tone while the central bank raised interest rates. Powell promised further rate increases even as data showed signs of a weakening economy.

The S&P 500, the Dow Jones industrials and the Nasdaq have sold off sharply for December and are on track for their biggest annual declines since the 2008 financial crisis.

While U.S. Treasury yields gained, investors ran from stocks, eyeing prospects of safer bets as they worried about the likelihood of a recession in 2023 according to Brian Overby, senior markets strategist at Ally.

"Investors are asking why do I want to take those risks going into 2023 with the Fed's stance still aggressive when I can get such a good yield on the fixed income market place," he said.

The lack of big earnings reports or economic data on Monday likely sharpened investors' focus on economic fears and interest rates, according to Melissa Brown, Global Head of Applied Research at Qontigo in New York.

"It's a knife edge between whether we're going to teeter into a recession or have a soft landing. Is the Fed acting appropriately?" said Brown who also noted that moves may be exaggerated as many investors take vacation around the end-of-year holidays.

The Dow Jones Industrial Average fell 162.92 points, or 0.49%, to 32,757.54, the S&P 500 lost 34.7 points, or 0.90%, to 3,817.66 and the Nasdaq Composite dropped 159.38 points, or 1.49%, to 10,546.03.

The biggest decliners among S&P industry sectors were communications services, which fell 2.2%, consumer discretionary, down 1.7% and technology, which lost 1.4%. Energy outperformed, closing up 0.13% as the sole industry out of 11 to manage a gain.

Market heavyweights such as Apple Inc, Microsoft Corp and Amazon.com Inc created some of the biggest drags on the market.

Trading in Tesla Inc was volatile with the electric carmaker closing down 0.24% after falling as much as 2.8% during the session. This was after a Twitter poll that showed a majority of respondents want Tesla Chief Executive Elon Musk to step down as CEO of the social media platform.

Meta Platforms shares finished down 4.1% after the European Commission said it could impose a fine of up to 10% of the tech conglomerate's annual global turnover if evidence showed an infringement of the EU's antitrust laws.

L3Harris Technologies Inc lost 3.6% after the U.S. defense contractor said it would buy hypersonic engine manufacturer Aerojet Rocketdyne Holdings Inc for $4.7 billion. Aerojet added 1.3%.

Shares of casino operators Melco Resorts & Entertainment tumbled just under 8% and Wynn Resorts lost 5.2% while Las Vegas Sands Corp fell 2.3% after Macau said on Friday that six casino firms will invest around $15 billion as part of new 10-year contracts they signed to operate in the world's biggest gambling hub.

Declining issues outnumbered advancing ones on the NYSE by a 2.80-to-1 ratio; on Nasdaq, a 2.63-to-1 ratio favored decliners.

The S&P 500 posted 5 new 52-week highs and 20 new lows; the Nasdaq Composite recorded 66 new highs and 456 new lows.

On U.S. exchanges 11.07 billion shares changed hands, compared with the 11.59 billion average for the last 20 trading days. (Reporting by Sinéad Carew, Sruthi Shankar, Shubham Batra, Johann M Cherian and Sruthi Shankar in Bengaluru; Editing by Saumyadeb Chakrabarty, Maju Samuel and David Gregorio)