Earlier, Asian stocks advanced, with Japan's Nikkei 225 index closing up 0.4 percent at 8,863.30 after the Bank of Japan announced no change in the country's key interest rate following a two-day policy meeting.

South Korea's Kospi gained 0.1 percent to 1,995.17 and Hong Kong's Hang Seng added 0.5 percent to 21,012.38.

Markets in China are closed for a public holiday.

U.S. stocks to watch include Wet Seal Inc., after the troubled retailer's chairman and three board members stepped down, replaced by nominees from activist shareholder The Clinton Group, which had been waging a proxy fight in an attempt to oust the chain's leadership. Wet Seal shares rose 3.5 percent to $3.25 in premarket trading.

Zynga Inc. dropped sharply in premarket trading after the online game maker said that it expects a third-quarter loss due to weak demand for some of its titles and a charge related to an acquisition. The stock plunged 56 cents, or 19.7 percent, to $2.26 before the market open.

And Dow component Hewlett-Packard Co.'s shares fell 14 cents to $14.80 in early trading, after Moody's Investors Service said it was reviewing its investment-grade credit rating and may downgrade, after the PC maker cut its profit expectations.

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