AlQa'dah 11, 1434, Sep 17, 2013, SPA-- Asian shares slipped slightly and the dollar treaded water on Tuesday, as global markets braced for the outcome of the U.S. Federal Reserve's two-day policy meeting at which it is widely expected to begin withdrawing stimulus, according to Reuters. Despite a lacklustre August jobs report, the U.S. central bank is expected to begin scaling back its quantitative easing scheme by reducing its monthly asset purchases by about $10 billion from the current $85 billion. MSCI's broadest index of Asia-Pacific shares outside Japan fell about 0.1 percent, with Japan's Nikkei stock average up 0.2 percent after Japanese markets were closed on Monday for a public holiday. Japanese shares caught up to news that former U.S. Treasury Secretary Lawrence Summers unexpectedly withdrew from consideration for the U.S. central bank's top job on Monday. Summers was seen as more prone to wind down stimulus than the new front-runner, Fed Vice Chairwoman Janet Yellen.