Stocks Tumbled at Open, Oil Futures Plunged

U.S. stocks tumbled at open on Monday, triggering a so-called circuit breaker that halts stock-market trading for 15 minutes until 9:49 a.m. Before being halted, the Dow Jones Industrial Average tumbled 1,884.88 points, or 7.29%, to 23,979.90. The S&P 500 dropped 208.16 points, or 7.00%, to 2,764.21. The Nasdaq Composite declined 588.18 points, or 6.86%, to 7.987.44.

Oil futures plunged to a four-year low Monday, on track for the biggest one-day drop since 1991 as OPEC and Russia appear headed for an all-out price war. West Texas Intermediate crude for April delivery dropped $9.11, or 22%, to $32.16 a barrel. May Brent crude was down $9.94, or 21.9%, at $35.25 a barrel.