The rupee appreciated by 6 paise to close at 73.49 (provisional) against the US dollar on Monday, tracking weakness in the American currency and positive domestic equities. The sustained foreign fund inflows also supported the rupee, traders said. At the interbank forex market, the domestic unit opened at 73.52 against the US dollar and witnessed an intra-day high of 73.47 and a low of 73.61. The local unit finally settled at 73.49 against the American currency, registering a rise of 6 paise over its previous close. On Thursday, the rupee had settled at 73.55 against the US dollar.