U.S. stocks fell for the first time in four sessions after reports circulated that Moderna Inc.’s vaccine study, which was credited in part for Monday’s rally, didn’t produce enough critical data to assess its success. Crude oil and Treasuries gained.
The S&P 500 and Nasdaq Composite turned negative in the last hour of trading, while the Dow Jones Industrial Average extended its losses. Equities had fluctuated much of the day after optimism over the drug as a potential coronavirus vaccine sent the S&P up the most Monday in almost six weeks. Crude oil rose for a fourth day.