Asian shares climbed on Wednesday, led by Chinese stocks on reopening hopes, while the dollar sagged as investors braced for the U.S. Federal Reserve's policy decision later in the day, with many hoping for signs of a slowdown in future rate hikes. European markets looked set to extend the cautious optimism, with the pan-region Euro Stoxx 50 futures up 0.5%. U.S. S&P 500 futures edged up 0.3% while the Nasdaq futures rose 0.4%. The world's biggest central bank is due to release its policy statement at 2 p.m. EDT (1800 GMT) on Wednesday, with investors set to closely scrutinise the...