Sensex, Nifty updates 17 January 2025: The BSE Sensex fell 423 points (0.55%) to 76,619.33, while the NSE Nifty 50 dropped 108 points (0.47%) to 23,203.20, marking weekly losses. IT stocks weighed on the indices amid concerns over December quarter earnings quality and a bleak outlook for the March quarter. The Indian rupee weakened further on Friday, recording its worst week in 18 months. Persistent foreign portfolio outflows and increased dollar demand in the non-deliverable forwards market drove the decline. Although the currency hit a record low of 86.6475 earlier in the week, frequent RBI interventions curbed steeper losses, according to traders.