Trader Daniel Ryan laughs as he works on the floor of the New York Stock Exchange Wednesday Jan. 23, 2008. Wall Street pulled off a stunning comeback Wednesday, surging higher in late trading and wiping out what looked to be yet another precipitous decline. The Dow Jones industrials, down more than 323 points in earlier trading, ended the day with an advance of just under 300 points, according to preliminary calculations. [Agencies]