India's foreign exchange reserves fell by $1.32 billion to $317.31 billion for the week ended Sep 5, Reserve Bank of India (RBI) data showed.
The reserves had grown by $60.5 million to $318.64 billion for the week ended Aug 29.
According to the RBI's weekly statistical supplement, foreign currency assets, the biggest component of the forex reserves, decreased by $1.02 billion at $290.36 billion in the week under review.
The foreign currency assets increased by $75 million to $291.39 billion for the previous week.
The RBI said the foreign currency assets, expressed in US dollar terms, include the effect of appreciation or depreciation of non-US currencies held in reserve such as the pound sterling, euro and yen.
India's reserve position with the International Monetary Fund (IMF) slipped by $16 million to $1.67 billion.
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The value of special drawing rights (SDRs) was down by $41.6 million at $4.34 billion.
The value of gold reserves fell $240.7 million at $20.93 billion for the week ended Sep 5. The value of gold reserves had remained static at $21.17 billion since Aug 22.