U.S. stocks ended a tumultuous day with strong gains after a false tweet briefly sent financial markets veering on Tuesday, underscoring technology's role in tightly linking global markets.

The Dow Jones Industrial Average briefly plunged Tuesday afternoon before finishing with a gain of 152.29 points, or 1.05%, to 14719.46. Oil also briefly dipped, while U.S. Treasury bond prices soared, after a tweet from the Associated Press's Twitter account claimed that there were two explosions in the White House and that President Barack...