Dow crashes 10% in biggest one-day percentage drop since 1987

U.S. stocks tumbled more than 9% on Thursday, with Wall Street extended its dramatic slide into a bear market as the Dow, S&P 500 and Nasdaq all crashed in response to the global COVID-19 coronavirus pandemic.
Javier E. David, Emily McCormick, and Nishant Mohan for Yahoo Finance:Weeks of panic-driven selling has dragged blue-chip stocks into bear market territory at a breathtaking pace, of less than a month from peak to trough.
By Thursday’s close, the S&P 500 dropped 9.5%, or 260.