Market-watchers could complain of whiplash following one of the craziest days on Wall Street in more than a year. More than 15.9 billion shares changed hands today, more than twice the daily average volume. But by the closing bell, the Standard & Poor's 500 closed down less than a point.
For the week, the Dow Jones Industrial Average fell 5.8 percent, the S&P 500 was down 7.2 percent, and the Nasdaq was off 8.1 percent. Bottom line: It was the worst week since November 2008.