Most Asian stocks fell, with the regional benchmark index dropping from a 16-month high amid concern U.S. budget negotiations are faltering and as a surging yen weighed on Japanese stocks. The Bank of Japan  boosted its asset purchase program for the third time in four months.

Nikkei 225 10,039.33 -121.07 -1.19%

S&P/ASX 200 4,634.11 +16.33 +0.35%

Shanghai Composite 2,168.35 +6.11 +0.28%

Samsung Electronics Co., which gets a fifth of its revenue in America, dropped 0.8 percent in Seoul.

Canon Inc., a camera maker that gets 80 percent of its sales outside Japan, dropped 2.9 percent.

Mitsubishi UFJ Financial Group Inc., Japan’s biggest lender, advanced 1.2 percent.

Nissan Motor Co. slumped 7.4 percent after Nomura Holdings Inc. cut its rating on the stock.