The reserves, which had hit an all-time high of USD 704.885 billion in end-September, have been declining for multiple weeks, at a time when the rupee has also been under pressure.
For the week ended November 22,
Expressed in dollar terms, the foreign currency assets include the effect of appreciation or depreciation of non-US units like the euro, pound, and yen held in the foreign exchange reserves.
The special drawing rights (SDRs) were down USD 79 million to USD 17.985 billion, the apex bank said.
India's reserve position with the IMF was also down USD 15 million to USD 4.232 billion in the reporting week, the RBI data showed.