The domestic unit finally settled at 88.31 (provisional), lower by 15 paise over its previous close. On Friday, the rupee appreciated four paise to close at 88.16 against the US dollar. "We expect the rupee to remain weak as the US visa fee hike may dent market sentiments, which may weigh on the domestic currency. India's forex reserves jumped USD 4.698 billion to USD 702.966 billion for the week ended September 12, the Reserve Bank of India (RBI) said on Friday. In the previous reporting week, the overall reserves had increased USD 4.038 billion to USD 698.268 billion.