Stocks locked in big gains today with the rally sparked by the rollout of the Treasury’s financial rescue plan, the Wall Street Journal reports. Financials led advances, with Citigroup and Bank of America up 24% and 19%, respectively. The Dow jumped 497.48 to 7,775.86. The Nasdaq rose 98.50 to 1,555.77, and the S&P 500 gained 54.38, settling at 822.92. (More Dow Jones stories.)