Japan's Nikkei 225 index surges 7.7 percent amid broad gains for Asian stock markets

Markets Associated Press

A man walks past an electronic stock board of a securities firm in Tokyo Wednesday, Sept. 9, 2015. Japan's Nikkei 225 index gained more than 800 points during a morning trading. (AP Photo/Eugene Hoshiko) (The Associated Press)

Japan's Nikkei 225 stock index has surged 7.7 percent amid strong advances by other Asian markets.

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The Nikkei 225 index closed Wednesday up 1,343.43 points, or 7.7 percent, at 18,770.51.

That was the biggest one-day jump since October 2008.

Investor sentiment has been buoyed by a rebound on Wall Street, hopes for stability in volatile Chinese stocks and expectations for corporate tax cuts in Japan.