India, May 21 -- Following a moderate pullback in the previous session, stocks showed a more substantial move to the downside during trading on Wednesday. The major averages rebounded from an initial decline but once again slumped into negative territory as the day progressed.

The major averages ended the day off their worst levels but still sharply lower. The Dow plunged 816.80 points or 1.9 percent to 41,860.44, the S&P 500 slumped 95.85 points or 1.6 percent to 5,844.61 and the Nasdaq tumbled 270.07 points or 1.4 percent to 18,872.64.

The weakness on Wall Street came amid lingering uncertainty about the outlook for trade and the global economy following the surge seen over the past several weeks.

Stocks have shown a substantial recove...