A rally in U.S. stocks that lifted both the S&P 500 and Nasdaq by 1% and the Dow by 0.8% nonetheless left investors battered by markets’ wild swings and bracing for more turbulence.

A rally in U.S. stocks that lifted both the S&P 500 and Nasdaq by 1% and the Dow by 0.8% nonetheless left investors battered by markets’ wild swings and bracing for more turbulence.