The Indian rupee, however, saw the largest bullish bets in one year as worries about inflation eased.
Bearish bets on the Singapore dollar and the peso rose to their largest since late August, according to the bi-weekly survey of 14 analysts.
The city-state's currency hit a near five-month low to the US dollar as local speculators and funds sold it on signs of a slowing economy.
The peso fell to its weakest since September 2010 on stop-loss selling after breaks in chart and psychological supports and as offshore funds sold it.
Sentiment on the Taiwan dollar turned bearish with its short positions at the largest level since late August.
The Taiwan central bank was spotted intervening to prevent the island's currency from outperforming the South Korean won, according to local traders.
Long positions in the won nearly halved to the lowest since late August, when sentiment on the won was slightly bearish.
Offshore funds cut optimistic bets on the currency as the foreign exchange authorities kept warning against further appreciation in the second-best performing emerging Asian currency in 2013.
The outlook for emerging Asian currencies remained dark as a solid US economic recovery bolstered expectations that the Federal Reserve will continue to scale back its bond-buying programme giving a boost to
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