Wall St ends up

US shares gained over 2 per cent across the board with Dow and S&P 500 logging their best one-day gains in 2012,amid growing hopes that central banks around the world will implement further measures to support the global economy.
Dow Jones Industrial Average closed up 286.84 points, or 2.37 per cent at 12,414.79.
S&P 500 surged 29.63 points, or 2.30 per cent at 1,315.13.
All 10 S&P sectors closed firmly in positive territory, led by financials and energy.
Nasdaq composite added 66.61 points, or 2.40 per cent to end at 2,844.72.