Market Report - May. 6, 2010 Alexandra Twin, senior writer May 6, 2010: 7:36 PM ET

NEWYORK( -- In one of the most gut-wrenching hours in Wall Street history, the Dow plunged almost 1,000 points Thursday before recovering to close down 348, as erroneous trading in Procter & Gamble and several other stocks sparked a massive selloff.

Fears about the spread of the European debt crisis dragged on stocks through the early afternoon. But the selling picked up in intensity and the Dow rea