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)

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 index surges 7.7 percent amid broad gains for Asian stock markets

Markets 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.