Commercial banks across India are preparing to report mark-to-market (MTM) treasury losses or sharply lower trading profits in the second quarter ended September 30, 2026 (Q2 FY27), following a steep hardening of sovereign bond yields. Over the July–September quarter, yields on benchmark central government securities (G-secs) climbed significantly, eroding the market value of tradeable government bonds held across lenders’ investment portfolios.
The yield spike—driven by lingering food and energy price pressures, persistent liquidity drainage by the Reserve Bank of India (RBI), and mounting bets that the Monetary Policy Committee (MPC) may tighten monetary conditions—is expected to weigh directly on lenders’ non-interest income and quarterly profit after tax (PAT).
Key takeaways
- Sharp yield surge across the curve: The 10-year benchmark government bond yield hardened by 42 basis points during Q2 FY27, while the 5-year yield rose 43 basis points to close around 6.85%, marking one of the steepest quarterly yield increases in over two years.
- Mark-to-market provisions: Because bond prices move inversely to yields, the sudden 40+ bps increase requires banks to make mark-to-market (MTM) provisioning on securities held in their Available for Sale (AFS) and Held for Trading (HFT) books.
- Non-interest income drag: Treasury gains, which provided a tailwind to bank profitability during periods of declining interest rates, will turn into an operational drag, curbing other income across public and private sector banks.
- PSU banks more vulnerable: State-run lenders with larger investment portfolio durations and higher modified duration exposure in tradeable categories face relatively higher MTM hits compared to private lenders that shortened portfolio maturity profiles.
- Central bank policy overhang: The yield hardening reflects market pricing of extended central bank liquidity absorption, higher domestic inflation prints, and global bond market volatility driven by rising US Treasury yields.
Market mechanics: Why hardening yields trigger bank treasury losses
Under commercial banking operations, lenders invest a substantial portion of customer deposits in sovereign and state government bonds to meet statutory liquidity ratio (SLR) requirements and generate interest income.
However, under RBI investment classification guidelines, these securities are categorized into specific balance-sheet buckets:
BANK INVESTMENT PORTFOLIO CLASSIFICATION:
[ HELD TO MATURITY (HTM) ] ──────────► Insulated from MTM fluctuations
- Carried at amortized cost; no P&L hit from yield spikes
[ AVAILABLE FOR SALE (AFS) ] ────────► Marked to market at quarterly close
- Fall in market value requires provisions or equity hits
[ HELD FOR TRADING (HFT) ] ──────────► Marked to market continuously
- Direct hit to quarterly profit and loss (P&L) statement
Because bond yields and bond prices move in opposite directions, when market yields rise sharply:
- Bond Prices Drop: The resale market value of existing bonds with lower coupon rates falls as traders demand higher yields on newer debt.
- MTM Provisioning Required: Banks holding bonds in their AFS and HFT segments must mark their holdings down to current market prices. Any depreciation between book value and prevailing market prices must be recognized as an operational expense or provision, depressing net profits.
During Q2 FY27, the benchmark 10-year G-sec yield surged by 42 basis points, and the 5-year paper rose 43 basis points to 6.85%. A 40-plus basis point spike over a three-month window is substantial enough to erase quarterly coupon accruals on tradeable books, forcing net treasury write-downs.
THE Q2 FY27 YIELD CURVE HARDENING:
10-Year Benchmark G-sec Yield:
[██████████████████████████████████████████] +42 bps Quarter-on-Quarter
5-Year Sovereign Bond Yield:
[███████████████████████████████████████████] +43 bps (Ended Quarter at 6.85%)
└─► Bond Prices Drop across Medium & Long Durations
Catalysts behind the Q2 bond market sell-off
The hardening of yields across the sovereign curve was driven by a confluence of domestic liquidity shifts and macroeconomic developments:
| Market Catalyst | Mechanism | Impact on Bond Yields |
| RBI Liquidity Drainage | Open market operations & VRRR auctions to absorb excess cash | Shorter-end money market and sovereign yields pushed higher |
| Sticky Inflation Expectations | Lingering food and oil price spikes heading into festive quarter | Market pricing in potential policy rate hikes or delayed cuts |
| Heavy Sovereign Supply | Center & State Development Loan (SDL) auction pipelines | Market indigestion amid heavy borrowing calendars |
| Global Yield Spillovers | Elevated US Treasury yields and dollar strength | Foreign Portfolio Investors (FPIs) paring back debt holdings |
Source: Compiled from bond trading market updates and Reserve Bank of India market operations data.
1. Active absorption of banking system liquidity
To prevent inflationary pressures from becoming generalized, the Reserve Bank of India maintained tight operational oversight on durable liquidity, conducting variable rate reverse repo (VRRR) auctions and liquidity drain measures. As interbank liquidity tightened, money market rates and shorter-to-medium tenor bond yields drifted higher.
2. Shifting monetary policy expectations
Entering early 2026, fixed-income markets had priced in a gradual easing bias. However, sticky underlying core inflation, volatile crude prices linked to Middle Eastern geopolitical friction, and firm domestic economic growth led market participants to reverse rate-cut bets. In fact, swap markets began pricing in probabilities of policy tightening, causing the sovereign yield curve to shift upward and flatten.
Sectoral impact: Public sector banks vs. private lenders
The scale of treasury losses will vary across institutions depending on the modified duration and composition of their investment books:
- State-Run (PSU) Banks: Public sector lenders historically hold larger aggregate portfolios of government debt relative to their total asset base. While a majority of their holdings sit safely inside the amortized Held-to-Maturity (HTM) category, their AFS portfolios tend to carry slightly longer average maturities, making them more sensitive to price declines when long-term benchmark yields spike.
- Large Private Banks: Private sector lenders (such as ICICI Bank, HDFC Bank, and Axis Bank) have actively shortened the modified duration of their tradeable books over recent quarters, focusing on floating-rate debt and short-term Treasury bills. While they will still report subdued or negligible treasury profits compared to previous quarters, the direct provisioning drag on their bottom lines is expected to be more muted.
Broader implications for bank earnings in Q2 FY27
The anticipated treasury losses come at an inopportune moment for bank earnings, as several other operating variables are already exerting pressure on net profit growth:
THE DUAL SQUEEZE ON Q2 FY27 BANK PROFITABILITY:
CORE LENDING MARGINS TREASURY & NON-INTEREST INCOME
-------------------- ------------------------------
- Deposit costs remain elevated - Bond yields harden 42–43 bps
- High share of expensive term FDs - MTM provisioning required on AFS/HFT
- Net Interest Margin (NIM) stable - Treasury profits drop toward zero or
to slightly compressed turn into outright quarterly losses
- Compressed other income: For several quarters, robust treasury gains—realized through bond rallies—cushioned bank earnings during periods of moderate loan growth. With that cushion removed, non-interest income growth will decelerate.
- Elevated cost of funds: Banks have had to aggressively mobilize term deposits at elevated interest rates (between 7.0% and 7.5%) to rebalance their credit-to-deposit ratios, keeping overall funding costs sticky.
- Reliance on core net interest income: To maintain bottom-line growth, banks will have to rely almost entirely on core net interest income (NII) expansion and retail fee generation, leaving little room to absorb unexpected provisioning spikes or retail unsecured slippages.
What to watch next
- RBI Monetary Policy Committee (MPC) outcome: Bond markets will closely dissect the upcoming MPC policy statement and Governor’s commentary for forward guidance on liquidity management and inflation projections.
- Q2 FY27 earnings disclosures: As commercial banks begin publishing their audited quarterly statements starting mid-October 2026, analysts will monitor the line item for “Provisions for Depreciation on Investments” to calculate the exact dollar impact of the yield surge.
- Borrowing calendar execution: Market participants will track demand at weekly central government debt auctions to determine whether institutional buyers, including pension funds and insurance companies, step in to absorb paper at current yield levels.
Frequently asked questions
Why do rising bond yields cause treasury losses for banks?
Bond prices and bond yields move in opposite directions. When bond yields rise (harden), the market prices of existing bonds decline. Banks must mark their tradeable bond portfolios (AFS and HFT) to market value at the end of each quarter, which requires them to record accounting losses or set aside provisions for the drop in market value.
How much did bond yields rise in Q2 FY27?
During the July–September quarter of FY27, the 10-year benchmark government bond yield rose by 42 basis points, while the 5-year sovereign bond yield climbed 43 basis points to finish the quarter near 6.85%.
Are all bonds held by banks affected by treasury losses?
No. Bonds classified under the Held to Maturity (HTM) category are carried at amortized acquisition cost and do not need to be marked to market for quarterly profit-and-loss calculations. Only securities held under Available for Sale (AFS) and Held for Trading (HFT) categories are exposed to MTM provisioning.
Which banks are more vulnerable to hardening bond yields?
Banks that maintain longer average portfolio durations or hold a higher proportion of tradeable securities in their AFS and HFT books—historically including several public sector banks—are more exposed to mark-to-market depreciation than lenders holding short-duration, floating-rate instruments.
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