The spot rupee ended at 153.50/60 per dollar, up from Friday's close of 153.73/78.

"There were sizable exporter (dollar) sales. The foreign banks are also selling and with the port deal the rupee will strengthen on expected inflows and positive sentiment," a currency dealer said, requesting anonymity.

"There was state (banks') demand, but there were sizable exporter dollar sales which helped the rupee."

Central bank Governor Indrajith Coomaraswamy earlier said the rupee was still "over-valued" and that the monetary authority was buying dollars to avoid any appreciation.

The banking regulator is compelled to buy dollars from the market to meet a reserves target set by the International Monetary Fund (IMF) under a $1.5 billion, three-year loan programme.

Dealers said a port deal signed during the weekend also helped boost sentiment.