Dow jumps 400 points, biggest gain since March '09

Traders work on the floor of the New York Stock Exchange Wednesday, Nov. 30, 2011. Stocks soared in morning trading Wednesday after major central banks acted together to support the global financial system by cutting short-term borrowing rates. (AP Photo/Richard Drew)

November 30, 2011 1:28:27 PM PST
A coordinated move by the world's central banks to ease borrowing costs sent stocks shooting higher. The Dow Jones industrial average jumped 490 points, its biggest gain since March 2009.