The Dow Jones Industrials saw its five-session win streak in danger, dropping 133.99 points by noon hour EDT to 34,620.94
The S&P 500 progressed 6.9 points to 4,470.02,
The NASDAQ Composite slipped 6.07 points to 13,887.77.
Last week, the three major averages notched their best week since November 2020, boosted largely by growth stocks.
Information technology and communications services were the worst-performing sectors in the S&P 500 on Monday. Facebook parent Meta lost about 2% and Microsoft ticked marginally lower.
On Monday, Boeing dropped about 4% after a China Eastern Airlines Boeing 737 passenger plane crashed, weighing on the Dow.
On the upside, energy stocks rallied Monday as oil prices rose. Occidental Petroleum and Marathon Oil were among the top gainers on the S&P 500, each rising roughly 8%.
Nike and Tencent Music report quarterly results after the market closes Monday.
Market participants are also monitoring the war between Russia and Ukraine. Ukraine’s President Volodymyr Zelenskyy warned if peace talks with Russian leader Vladimir Putin fail, it would mean the start of a “third world war.”
Ukrainian and Russian officials have met intermittently for peace talks, which have failed to progress to key concessions. Ukraine has also rejected an ultimatum to surrender the city of Mariupol to Russian troops.
Treasury prices plummeted, raising yields to 2.24% from Friday’s 2.15%. Treasury prices and yields move in opposite directions.
Oil prices gained $5.41 to $110.11 U.S. a barrel.
Gold prices improved $5.50 to $1,934.80 U.S. an ounce.