India's foreign exchange reserves have dropped by a massive 1.649 billion US dollar to 314.661 billion dollar in the week to December 5. According to RBI data released today stated the forex reserve have fallen due to decline in the Foreign Currency Assets (FCAs), which is a major constituent of overall reserves.The RBI data showed that this week FCAs declined by 867.4 million dollar US to 289.954 billion dollar. FCAs, expressed in dollar terms, include the effect of appreciation and depreciation of non-US currencies such as the Euro, Pound and Yen, held in reserves.The RBI data also stated that the country's gold reserves, too, dropped by 753.2 million US dollar to 18.985 billion dollar. The Data showed that Special Drawing Rights (SDRs) decreased by 21.6 million US dollar to 4.208 billion dollar, while the country's reserve position with the IMF dipped by 7.7 million dollar to 1.513 billion US dollar during the week under review.