Stocks rose at the open on Thursday on optimism the leaders at the G20 meeting underway in London will agree on ways to temper the economic crisis. Highlights:

* FASB says new mark-to-market effective in Q2

* KBW banks index <.BKX> rises 4.7 percent

* Jobless claims were higher than expected

* The Dow Jones industrial average <.DJI> gained 165.43 points, or 2.13 percent, to 7,927.03. The Standard & Poor's 500 Index <.SPX> added 17.64 points, or 2.17 percent, to 828.72. The Nasdaq Composite Index <.IXIC> rose 27.14 points, or 1.75 percent, to 1,578.74.

(Reporting by Rodrigo Campos)