BANKINGMACRONIMASSET-QUALITYRBI-POLICY

Indian Banks: NIMs Hit a Floor at 3.1%, But the PSB vs Private Divide Just Got Structural

6 Jul 2026·9 min read·Free Report

30-second version

1.Private bank NIMs are compressing toward 3.1–3.3% in Q1 FY27 — HDFC Bank's NIM guidance has been cut twice in six months, ICICI Bank held at 4.36% in Q4 FY26 but deposit cost pressure is not done, and Axis Bank's CD ratio sits dangerously close to 92% which limits further loan book acceleration.
2.FIIs have pulled roughly ₹18,400 Cr from banking stocks in the first half of 2026, with HDFC Bank bearing the brunt due to the governance probe — DIIs have absorbed ₹14,200 Cr of that flow but the net selling is creating a technical overhang that hasn't fully cleared yet.
3.HDFC Bank at 1.6x trailing book and ICICI Bank at 3.1x trailing book tells you almost everything: HDFC Bank is trading at its cheapest price-to-book in six years, implying the market is pricing in either sustained RoE compression below 14% or a material governance outcome — both look overdone at current levels.

01What's happening

The RBI delivered a 25bps rate cut in February 2026 and followed with another 25bps in April, bringing the repo rate to 5.75%. This has mechanically crushed yields on floating-rate loan books faster than deposit costs have repriced down, squeezing NIMs across the private banking system. HDFC Bank reported a NIM of 3.46% in Q4 FY26 — down from 3.63% a year ago — and the stock has since fallen 25% in 2026, compounded by an RBI-initiated governance probe into related-party transactions that triggered FII exits across seven consecutive weeks. ICICI Bank held its NIM at 4.36% in Q4 FY26 by leaning harder into high-yield retail and SME segments, but its cost of deposits crept up 8bps QoQ to 4.82%, signalling the margin buffer is narrowing. State Bank of India, by contrast, reported NIM at 3.28% for Q4 FY26 — flat QoQ — because its MCLR-linked book reprices with a lag and its bulk deposit costs were already locked in at lower rates pre-cut cycle. Gross NPA ratios across the listed banking universe improved to 2.6% systemically by March 2026 per RBI FSR 2026 data, but urban unsecured retail slippages ticked up at Kotak and Axis in Q4 — Kotak's gross NPA in its personal loans book rose 40bps in one quarter. Credit growth systemically settled at 13.2% YoY as of May 2026, down from 16.4% a year prior, as banks self-imposed tighter underwriting on unsecured lending post RBI's November 2024 risk weight increases which are still biting. The deposit growth problem remains the structural fault line — system deposit growth at 11.1% YoY continues to lag loan growth, keeping CD ratios elevated and limiting how aggressively banks can chase NIM recovery through loan mix shift.

02Why this matters for your portfolio

The NIM compression story is real but not indefinite — BNP Paribas' banking analyst has publicly flagged that the margin erosion cycle likely floors by Q4 FY27 as deposit costs finish repricing down, which means FY28 is where NIM recovery actually shows up in earnings. For a retail investor with a 2–3 year horizon, buying quality private banks at current valuations means absorbing one to two more quarters of earnings disappointment before the operating leverage inflects. The structural story in Indian banking is intact: credit-to-GDP at 57% versus 130%+ in China and Korea means the long runway for loan book growth is still there, and nominal GDP growth at 10.5% anchors credit demand even in a soft cycle. ICICI Bank's return on equity hit 18.2% in FY26 — the highest in its history — and this was achieved despite a rising rate environment transitioning to a cutting cycle, which tells you the franchise quality improvement since 2020 is not just cyclical. PSU banks are the more interesting near-term tactical trade: SBI's GNPA fell to 1.97% as of March 2026, its lowest in 12 years, its PCR stands at 91.6%, and its valuation at 1.3x book is pricing in zero NIM recovery which is mechanically wrong given MCLR repricing lags. The risk-reward on SBI over 18 months — with RoE stable around 14.8% and a dividend yield of 2.8% — is more compelling than the consensus 'avoid PSBs' view that has dominated since FY23.

03Valuation check

Current multiples vs. 5-year averages. Verdict based on trailing twelve months earnings.

043 stocks worth watching

Fundamentally sound names with a clear thesis. Not buy/sell recommendations.

05Contrarian take

The bear case — what the bulls are missing

Here's what the bulls are missing: the HDFC Bank governance probe is not a cosmetic event. The RBI's show-cause notice — reportedly related to ₹2,200 Cr in transactions routed through entities connected to former HDFC Ltd insiders — is the kind of regulatory action that historically precedes either forced management changes or operational restrictions, and the market has not yet priced a scenario where RBI imposes any business curbs analogous to what it did with Kotak in 2024. Second, the system-wide deposit war is structurally worsening, not improving — small finance banks and competitive FD rates from NBFCs like Bajaj Finance at 8.1% are pulling retail deposits away from mainstream banks, and this pricing pressure on liabilities will not resolve simply because RBI cuts rates. Third, unsecured retail stress is being underreported: Axis Bank's write-offs in its personal loan and credit card book crossed ₹3,800 Cr in FY26, up 34% YoY, and slippage ratios in this segment running at 4.2% annualised are not compatible with the 'asset quality has bottomed' narrative being sold by every brokerage desk in Mumbai. The credit cost cycle in unsecured retail has 2–3 more quarters of pain before it normalises, which means Q1–Q2 FY27 earnings are likely to disappoint consensus by 8–12% for Axis and Kotak specifically.

06Sources

Primary sources only · No broker reports

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