The Dow Jones Industrials swooned 190.89 points to end the week at 38,714.77.
The much-broader index gave back 33.39 points to 5,117.09.
The NASDAQ faltered 155.35 points, or 1%, to 15,973.17.
The S&P 500 is down roughly 0.3% from the start of the week, while the 30-stock Dow declined 0.2% and NASDAQ shed 0.7%.
Tech shares were broadly lower, with Apple and Microsoft down more than 1% and 2%. Shares of Amazon and Google-parent Alphabet also fell. Nvidia bucked the trend, however, climbing more than 1%. The chipmaker has whipsawed this week as traders worry about the stock’s valuation and book profits in the high-flying name.
Trading volumes was elevated and prices proved volatile Friday as futures and options on stock indexes and individual stocks all expire simultaneously in a process known as “triple witching” that happens once a quarter.
Prices for the 10-year Treasury lost ground, lifting yields to 4.31% from Thursday’s 4.29%. Treasury prices and yields move in opposite directions.
Oil prices skidded 26 cents to $81.00 U.S. a barrel.
Gold prices sagged $7.20 to $2,160.30.