The central bank bought USD 3.95 billion from spot market, while it sold USD 2.03 billion in the reporting month, RBI said in its monthly bulletin release today.
In April, RBI had net bought USD 1.34 billion and USD 554 million in May.
Last year in June, the apex bank had net purchased USD 565 million after it bought USD 5.53 billion and sold USD 4.97 billion in spot market.
In FY16, RBI was net purchaser of USD 10.21 billion when it had bought USD 63.30 billion and sold USD 53.09 billion.
RBI intervention in the foreign exchange market is aimed at curbing volatility in the currency market.
In the forward dollar market, the outstanding net forward sales was USD 7.43 billion as of end-June.