Wall Street Live, June 5 -- US stocks surged on Thursday on optimism about tariff negotiations between the US and China, and ahead of Friday's jobs data.

US President Donald Trump and Chinese leader Xi Jinping have agreed on a phone call to negotiate on tariffs.

At 12:09 PM ET, the Dow Jones Industrial Average rose 145.34 points, or 0.33%, to 42,573.08, the S&P 500 gained 23.25 points, or 0.39%, to 5,994.06 and the Nasdaq Composite was up 115.99 points, or 0.60%, at 19,576.48.

At 10:20 AM ET, the Dow Jones Industrial Average fell 126.69 points, or 0.30%, to 42,301.05, the S&P 500 lost 12.71 points, or 0.21%, to 5,958.10 and the Nasdaq Composite lost 31.13 points, or 0.16%, to 19,429.36.

At the open, the Dow Jones Industrial Average ro...