Total reserves were up by USD 419.4 million to USD 315.55 billion during the previous reporting week.
Foreign currency assets, a major constituent of overall reserves, decreased by USD 664.3 million to USD 289.398 billion for the week ended November 21, the RBI said.
Foreign currency assets, expressed in dollar terms, include the effect of appreciation and depreciation of non-US currencies such as euro, pound and the yen held in reserves.
The special drawing rights (SDRs) were down by USD 5.9 million to USD 4.223 billion, while the country's reserve position with the IMF declined by USD 2.2 million to USD 1.518 billion during the week, the RBI data showed.