What financial ratios matter most for analysing Indian banks?

The four most important ratios for Indian banks are Net Interest Margin (NIM), Return on Equity (ROE), Gross NPA ratio, and CASA ratio. NIM above 4% indicates strong pricing power; ROE above 15% signals efficient capital use; Gross NPA below 2% shows credit quality; and CASA above 40% means low-cost funding. Use the BBS Stock Scorecard to benchmark any bank against these thresholds.

How is a private bank different from a PSU bank for investors?

Private banks typically have higher ROE (15-20%) vs PSU banks (8-12%), better asset quality, and stronger fee income. PSU banks trade at lower Price-to-Book multiples (0.5-1x) vs private banks (2-4x). The trade-off is that PSU banks have government backing and broader rural reach. BBS analysis uses PB ratio and ROE together to judge which is more attractive at a given price.

What causes NPA cycles in Indian banking?

NPA (Non-Performing Asset) cycles are typically triggered by over-lending to a particular sector during boom times — infrastructure, real estate, or telecom — followed by project delays or demand collapse. Banks that concentrated corporate loans without adequate collateral coverage face the most severe NPA cycles. The BBS Red Flag Detector identifies OCF/PAT divergence and rising interest coverage stress as early warning signals before NPAs spike.

HDFC Bank Post-Merger Analysis 2026 | NIM Compression | Balance Sheet

The HDFC-HDFC Bank merger in July 2023 created India's largest private bank. It also compressed NIM from 4.1% to 3.4%, raised the loan-to-deposit ratio to uncomfortable levels, and created a deposit mobilisation challenge that will define the next three years. Here is the complete balance sheet analysis.

When HDFC Limited merged with HDFC Bank in July 2023, it created India's largest private sector bank with assets exceeding ₹35 lakh crore. The merger's logic was sound — HDFC Bank gets a sticky, long-tenor mortgage book; HDFC Limited shareholders get liquidity and lower cost of funds. But mergers always create a transition period, and HDFC Bank's transition period is being closely watched by every institutional investor in India.

NIM Compression: The Core Issue

Pre-merger, HDFC Bank's standalone Net Interest Margin (NIM) was approximately 4.1%. Post-merger, consolidated NIM dropped to ~3.4%. The compression occurred because HDFC Limited's wholesale-funded, fixed-rate mortgage book (borrowed at market rates, lent at fixed home loan rates) carries significantly lower spreads than HDFC Bank's retail lending business. As the legacy HDFC book matures and reprices, NIM will gradually recover — management has guided for recovery toward 3.7-3.8% over 3-4 years.

The Loan-to-Deposit Ratio Challenge

HDFC Bank's LDR post-merger spiked to ~110% — meaning it was lending more than its deposit base, plugging the gap with wholesale borrowings inherited from HDFC Ltd. RBI's comfort zone is 85-90% LDR. The bank has been actively growing deposits faster than loans — deposit growth in FY25 outpaced loan growth — and the LDR has improved toward 95-97%.

Consolidated assets: ₹35+ lakh crore (post-merger)
NIM: 3.4% (post-merger) vs 4.1% (pre-merger standalone)
LDR: reduced from ~110% to ~97% by FY25
CASA ratio: ~44% (target: return to 48%+)
GNPA: 1.24% — asset quality remains strong

🔍 BBS Insight

HDFC Bank post-merger is not a broken business — it is a world-class franchise going through a predictable, manageable dilution. The analytical framework is to track the three normalisation metrics quarterly: NIM recovery (3.4% → 3.7%), LDR reduction (97% → 88%), and CASA ratio improvement (44% → 47%). When all three trend in the right direction simultaneously, the stock's valuation discount to pre-merger levels becomes difficult to justify. That is when re-rating happens.

HDFC Bank Post-Merger: A Complete Balance Sheet Audit

NIM Compression: The Core Issue

The Loan-to-Deposit Ratio Challenge

🔍 BBS Insight