Bearish bets on most emerging Asian currencies increased in the last two weeks, with short positions in the Singapore dollar at a six-year high, as the Federal Reserve moved closer to raising interest rates, a Reuters poll showed on Thursday. Short positions on the Chinese yuan (CNY=CFXS), however, were reduced on perceptions that the central bank would support the currency, according to the survey of 12 currency analysts from banks and asset management companies conducted between Tuesday and Thursday.