The exchange is around five percent up on the day, following the president-elect's comments.
Stock exchanges in Europe and Asia have rose strongly this morning, with hopes high among investors for further government rescue schemes for businesses struggling in the credit crunch.
The FTSE 100 in London surged almost six percent on opening, gains matched by the DAX in Frankfurt and the Cac 40 in Paris. Asian exchanges had also risen overnight, with the Hang Seng in Hong Kong closing nine percent up and Tokyo's Nikkei 225 putting on over five percent.
At the source of much of the positive investor sentiment are hopes that US president-elect Barack Obama is putting together a substantial stimulus plan to help boost GDP when he takes office next year. Official statistics show that America has been in recession for a year, but a recovery in the world's biggest economy would have the likely effect of helping to lift others out of their own recessions.
However, some experts expressed caution at this morning's rally, pointing out that the stimulus hopes come against a background of poor global manufacturing and jobs data, as economies around the world continue to slow.
Speaking to Reuters, Henk Potts at Barclays said: "This is a short term relief rally against a backdrop of relatively cheap valuations. Medium term we will need more information to sustain the rally, and overall the mood will remain nervous."
As of 14:35 GMT, the FTSE 100 was at 4246.88 points, 4.88 percent up on the day.
