Asian stocks fell, with the benchmark index paring its biggest monthly gain since 2012, on concern the U.S. government is headed for a shutdown amid a budget stalemate.

Nikkei 225 14,455.8 -304.27 -2.06%

Hang Seng 22,859.86 -347.18 -1.50%

S&P/ASX 200 5,218.88 -88.18 -1.66%

Shanghai Composite 2,174.66 +14.64 +0.68%

Toyota Motor Corp., which gets 31 percent of its revenue in North America, declined 2.6 percent.

Mizuho Financial Group Inc., Japan’s third-largest bank, sank 4.1 percent after its lending unit was penalized by Japan’s banking regulator for failing to end transactions with “anti-social” groups.

BHP Billiton Ltd., Australia’s biggest oil producer, dropped 1.7 percent as crude fell.