Bank Nifty Rejig: HDFC Bank & ICICI Bank Face Outflows as PSU Banks Gain Ground

India’s benchmark banking index, Bank Nifty, is set for its most significant overhaul in years with an upcoming rebalancing effective December 31, 2025, aimed at reducing concentration risk and better reflecting the broader financial sector. Key changes include: Expansion of Bank Nifty from 12 to 14 stocks Addition of

of India and nk as new constituents Capping of weights of the largest constituents to curb over-dependence on mega private banks The revamp will notably lower the combined weight of dominant private-sector giants HDFC Bank and ICICI Bank, which together have long accounted for a disproportionate share of the index. Analysts expect passive funds tracking Bank Nifty and FinNifty—estimated at over ₹25,000 crore in AUM—to trigger short-term selling pressure on these two blue-chips as their weights are trimmed. At the same time, public-sector lender Union Bank of India and private-sector player Yes Bank will see strong inflows as they enter the index. Other PSU banks, NBFCs, insurers, and financial exchanges are also likely to benefit from the new methodology that promotes greater diversification and gives higher representation to mid-tier and state-owned names.