The chart of the day is $PG (Procter & Gamble), which lost 30% at one point but rallied back to close down only 2%! It even took out the March 2009 low! Some say it was a trader's fat finger (ordering a billion shares instead of a million) combined with high frequency traders taking out stops. The NYSE CEO explains what happened in the CNN Money video below. The market took a surprise hit as well, down 9% at one point. Who knows what happened, but check out the print on the chart and read the articles.