The ringgit stood at 3.9245 per dollar as of 0109 GMT, compared to the previous close of 3.9220.
The currency on Friday hit 3.9280, its weakest since Sept. 2 1998, the day before the government pegged it at 3.8000 per dollar to put a floor under the currency during the Asian financial crisis. Malaysia lifted the peg in 2005.
Malaysia's international reserves fell to $96.7 billion as of July 31 from $100.5 billion on July 15, the central bank data showed on Friday.
"It now becomes a question of when does the bleeding stop?" asked Stephen Innes, senior trader for FX broker Oanda in Singapore.
"No doubt BNM (Bank Negara Malaysia) will continue to sell USD to temper the move higher but at what cost can they to do so as further drops in reserves will likely accelerate the move higher."
The central bank has been selling dollars and buying ringgit since June in an attempt to stem the ringgit's slide, traders said, but the ringgit has still been Asia's worst-performing currency this year, losing some 11 percent of its value against the U.S. dollar.
The ringgit's weakness has hit foreigners' appetite for local bonds, with five-year government bond yields rising to 3.856 percent, the highest level since Jan. 16.- Reuters
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