Jarring swings keep rocking Wall Street , and U.S. stocks erased a big morning gain to drop on Thursday as the market remains skittish following weeks of doubts and erratic moves.

After initially soaring toward what seemed like its best day since May, with an early surge of 1.9%, the S&P 500 erased all of it and fell 1.6%. The Dow Jones Industrial Average dropped 386 points, or 0.8%, and the Nasdaq composite sank 2.2%.

In Canada, the main S&P/TSX composite index fell more than 370 points, weighed down by losses in the basic materials sector.

The sharpest losses again hit what used to be the market’s biggest winners. Nvidia , cryptocurrencies and other areas that had soared with nearly relentless momentum, as traders feared missing out on more gains, forced the market lower. Bitcoin

See Full Page