The BSE Sensex slipped 1,605.44 points, a 2.15% fall, while the NSE Nifty dropped 546.15 points, 2.36%, as the combined market capitalisation of the top 10 listed companies fell ₹155.7 cr last week, according to the BSE filing.
HDFC Bank’s market cap slid ₹55.5 cr to ₹10,67 cr, its shares falling 5% over the period, making it the biggest single‑company loss in the index.
Bajaj Finance followed, eroding ₹34.18 cr to ₹5,77 cr; the company’s stock also slid, reflecting broader stress in the banking‑finance sector.
Other heavy‑weight hits included Reliance Industries, whose valuation fell ₹27.07 cr to ₹16,10 cr, and Life Insurance Corp., down ₹21.06 cr to ₹4,81 cr. Bharti Airtel’s market cap dropped ₹9.36 cr to ₹11,79 cr, while State Bank of India slipped ₹4.34 cr to ₹8,83 cr.
Infosys and ICICI Bank also saw declines, losing ₹2.88 cr and ₹1.28 cr respectively, whereas Tata Consultancy Services and Larsen & Toubro bucked the trend, gaining ₹23.52 cr to ₹9,14 cr and ₹1.79 cr to ₹5,01 cr.
Analysts warn that the erosion could tighten earnings outlook for the banking‑finance sector in the coming quarter; upcoming earnings for HDFC Bank and Bajaj Finance on December 15 are expected to hit market expectations.