India's forex reserves dropped by $1.88 billion to $686 billion during the week ended November 28, the RBI said on Friday. In the previous reporting week, the overall reserves had declined by $4.47 billion to $688 billion. For the week ended November 28, foreign currency assets, a major component of the reserves, decreased by $3.57 billion to $557 billion, the data showed. Expressed in dollar terms, the foreign currency assets include the effects of appreciation or depreciation of non-US units, such as the euro, pound, and yen, held in the foreign exchange reserves. Value of the gold reserves increased by $1.61 billion to $105.79 billion during the week, the RBI said.