In the previous week, the reserves had risen USD 1.574 billion to USD 354.28 billion.
Foreign currency assets, a major component of overall reserves, swelled USD 1.13 billion to USD 330.71 billion in the reporting week, the data showed.
Expressed in dollar terms, these include the effect of appreciation and depreciation of non-US currencies such as the euro, the pound and the yen held in the reserves.
"We estimate an additional USD 60 billion of reserves, taking overall holdings to USD 420 billion, could take care of key vulnerabilities such as unhedged external commercial debt, short-term external debt and portfolio outflows," the report said.
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In FY15, there was an accretion of foreign exchange reserves to the tune of USD 61.4 billion compared with USD 15.5 billion last year.
The special drawing rights with the International Monetary Fund were up by USD 26.6 million to USD 4.07 billion while the country's reserve position with the fund surged USD 8.5 million to USD 1.32 billion, the data showed.