Asian stocks fell as investors shied away from riskier assets after an unexpected drop in U.S. jobless claims fueled speculation the Federal Reserve will cut stimulus next month. Chinese shares reversed the biggest intraday surge since March 2009.

Nikkei 225 13,650.11 -102.83 -0.75%

Hang Seng 22,536.76 -2.49 -0.01%

S&P/ASX 200 5,113.86 -38.51 -0.75%

Shanghai Composite 2,068.45 -13.43 -0.64%

Australia & New Zealand Banking Group Ltd.  sank 3 percent after Australia’s third-largest bank by market value forecast interest margins will keep dropping.

Hyundai Merchant Marine Co. soared 6.9 percent in Seoul after North Korea and South Korea agreed to reopen the jointly operated Gaeseong industrial complex.

Chinese stock exchange officials are investigating a spike in the Shanghai Composite Index, which soared as much as 5.6 percent in two minutes.