LEARNING SECTION 01
Start with the purpose: a bank’s loss-absorbing cushion
AT1 means Additional Tier 1. These instruments help a bank absorb losses while it continues operating. Investors provide capital with scheduled coupons, but accept cancellation and principal-loss provisions. AT1 supplements common equity; it does not replace it.
Total regulatory capital = Tier 1 + Tier 2
CET1 consists principally of eligible ordinary equity and reserves after regulatory adjustments. Deposits are funding liabilities; regulatory capital is a loss-absorbing cushion.
Illustration holds liabilities constant and excludes taxes, fresh capital and other accounting adjustments. AT1 is not present in this opening example.
Framework: Basel definition of capital.
LEARNING SECTION 02
Compare AT1 with other bonds and equity
| Feature | Government bond¹ | Senior corporate / bank bond | Bank Tier 2 | Bank AT1 | Ordinary equity |
|---|---|---|---|---|---|
| Typical maturity | Dated | Dated | Dated | Perpetual | No maturity |
| Scheduled payment | Contractual interest | Contractual interest | Contractual interest | Coupon subject to cancellation | Discretionary dividend |
| Collateral | Sovereign obligation | May be secured or unsecured | Generally unsecured | Unsecured | Residual ownership |
| Relative bank claim² | Not applicable | Above subordinated capital | Above AT1 | Below Tier 2 | Residual |
| Special bank capital loss absorption | Not AT1 capital | Resolution law may apply | PONV provisions | Capital trigger + PONV | Absorbs accounting losses |
| Principal automatically due at first call? | Only if maturity coincides | Depends on contract | No | No | Not applicable |
| Main return driver | Rates and sovereign risk | Rates, credit and liquidity | Rates, credit and subordination | Credit, coupon, call and trigger risk | Earnings, dividends and valuation |
¹ Conventional domestic-currency government bond, not every sovereign instrument. ² Simplified relative ranking for instruments of the same bank. Regulatory intervention before liquidation is distinct from liquidation ranking. No rating or security label guarantees repayment or liquidity.
LEARNING SECTION 03
Coupon cancellation: income that may not arrive
Suppose you invest ₹10 lakh at a 9% annual coupon. The scheduled coupon is ₹90,000. Payment depends on the contract, distributable resources and regulatory conditions. A current-year loss alone does not settle whether payment is permitted; eligible reserves and capital restrictions also matter.
| Year | Coupon outcome | Cash received |
|---|---|---|
| 1 | Paid | ₹90,000 |
| 2 | Cancelled under the terms | ₹0 |
| 3 | Ordinary scheduled coupon paid | ₹90,000 — not ₹1,80,000 |
Read: RBI explanation of AT1 distributable items and an actual HDFC Bank AT1 terms document.
LEARNING SECTION 04
Five-year call? That is not a five-year maturity
Issue proceeds received
Illustrative first call opportunity
Instrument continues under its terms
An ordinary issuer call is generally available only after the stipulated minimum period, with prior supervisory approval. Exceptional tax or regulatory-event calls depend on the rules and contract. The investor cannot force ordinary repayment just because the first call date arrives.
Example: why might a bank not call?
An existing 9% coupon is cheaper than replacing it with equivalent capital at 11%, all else equal. The economic incentive to redeem weakens. Regulatory permission and any contractual reset also affect the decision.
LEARNING SECTION 05
Explore the capital trigger
The CET1 ratio compares eligible common equity with risk-weighted assets (RWA), not total assets. Indian AT1 explanatory provisions identify a 6.125% pre-specified CET1 trigger; check the applicable issue terms. This is a loss-absorption trigger, not a complete statement of the bank’s minimum capital requirements.
Capital-stress laboratory
Initial CET1 ₹8,000 crore; RWA ₹1,00,000 crore. Change recognised losses, holding RWA constant.
Simplified illustration: no taxes, fresh capital, RWA changes or resulting capital-restoration effects. It does not calculate the required write-down amount.
LEARNING SECTION 06
PONV, write-down and conversion
Point of Non-Viability (PONV) is a regulatory determination, distinct from the numerical CET1 trigger. RBI provisions address circumstances where write-off or conversion, or qualifying public-sector capital support, is necessary to avoid non-viability.
| Mechanism | Illustration on ₹10 lakh | Investor outcome |
|---|---|---|
| 40% permanent write-down | ₹4 lakh extinguished; ₹6 lakh remains | The extinguished amount does not automatically return. |
| Temporary write-down, if provided | Principal reduced subject to write-up provisions | Restoration is conditional, not assured. |
| Equity conversion | Debt claim exchanged for shares under the formula | Value depends on conversion terms and share price; no fixed repayment claim. |
Not every mechanism is available for every trigger. Indian PONV provisions refer to permanent write-off or conversion. Do not assume that temporary write-down terms apply at PONV.
LEARNING SECTION 07
Price and yield: an interactive illustration
For an idealised perpetual instrument paying a fixed, certain coupon forever, price = annual coupon ÷ required yield. This isolates interest-rate sensitivity; it is not a complete AT1 valuation model.
Fixed-coupon perpetuity explorer
Face value ₹1,000; annual scheduled coupon ₹90 (9%).
Assumes no call, reset, cancellation, default or write-down; annual periods and flat discount rate. Market AT1 valuation requires those features.
| Measure | Calculation / interpretation |
|---|---|
| Coupon rate | ₹90 ÷ ₹1,000 = 9%; based on face value. |
| Current yield at ₹900 | ₹90 ÷ ₹900 = 10%; ignores capital change and impairment. |
| Yield to call | Discount rate assuming specified coupons and call redemption occur. |
| Realised return | Depends on actual coupons, purchase price, sale/redemption and losses. |
For n annual periods: P = Σ Cₜ/(1+y)ᵗ + R/(1+y)ⁿ. The assumed redemption amount R is not certain merely because a call date is shown.
LEARNING SECTION 08
Exit risk: what a quoted price means
Suppose you hold ₹10 lakh face value paying a 9% scheduled annual coupon. A buyer offers a clean price of 80 per ₹100 face value.
| Calculation | Result |
|---|---|
| Clean sale proceeds: ₹10 lakh × 80% | ₹8 lakh |
| Capital loss against a purchase at par | ₹2 lakh |
| Loss ÷ scheduled annual coupon: ₹2 lakh ÷ ₹90,000 | About 2.22 years of coupons |
Accrued interest, charges and taxes are separate. This is a hypothetical sale, not a forecast. Compare an executable bid for your actual quantity with an indicative valuation: the latter may not be a price at which someone will buy.
A sale crystallises a market-price loss; a contractual write-down extinguishes a claim. These are different routes to a loss.
WORKED CASELETS · ISSUANCE TO INVESTOR OUTCOME
Three AT1 issues. Three very different outcomes.
Follow three fictional banks from issue pricing to investor performance. Each investor buys ₹10 lakh face value at par. Returns are before taxes and charges; annual periods, no coupon reinvestment and no accrued interest at sale are assumed. These are teaching scenarios, not actual bank issues or forecasts.
Pragati Bank: capital raised, coupons paid, call exercised
Issuance decision. A bank with sound earnings wants to expand lending while preserving regulatory capital headroom. It issues ₹1,000 crore of perpetual AT1 at par, with a 9% annual coupon and first ordinary call after five years.
| Illustrative issue pricing | Terms / amount |
|---|---|
| Reference benchmark + combined AT1 spread | 7.0% + 2.0% = 9.0% |
| Bank’s scheduled annual coupon on the issue | ₹1,000 crore × 9% = ₹90 crore |
| Investor’s purchase | ₹10 lakh at par |
Performance. The bank maintains adequate capital and distributable resources. Every coupon is paid. At year 5 it chooses to redeem at par and obtains the required approval.
| Year | Investor cash flow |
|---|---|
| 0 | −₹10,00,000 |
| 1–4, each year | +₹90,000 |
| 5 | +₹10,90,000: coupon plus principal |
Discuss: does this make the instrument a five-year bond?
No. Five years was the call assumption. Redemption occurred through an approved issuer decision, not an ordinary maturity obligation.
Sahyadri Bank: the coupon looks attractive; the exit disappoints
Issuance decision. The bank issues ₹1,000 crore at par with a 9% annual coupon and a year-5 first call. Its illustrative pricing is again 7% benchmark plus a 2% combined spread. For simplicity, this fictional contract retains the 9% coupon after a non-call; real issues may reset.
Performance. Earnings and capital headroom weaken. The year-3 coupon is validly cancelled under the terms. Coupons resume in years 4 and 5. At the first call, the bank does not redeem; the investor instead sells at a hypothetical executable clean bid of 66 per ₹100 face value.
| Year | Event | Investor cash flow |
|---|---|---|
| 0 | Purchase at par | −₹10,00,000 |
| 1 and 2, each | Coupon paid | +₹90,000 |
| 3 | Coupon cancelled | ₹0 |
| 4 | Coupon resumes | +₹90,000 |
| 5 | Coupon + sale: ₹90,000 + ₹6,60,000 | +₹7,50,000 |
The 66 price is a scenario assumption, not a model-implied quote. It can reflect a combination of weaker credit, liquidity and call expectations. We do not attribute the price fall solely to the non-call. The cancelled coupon remains forgone.
Discuss: why can total receipts exceed the investment while the return remains poor?
Timing matters. ₹10.2 lakh received gradually over five years is not equivalent to ₹10.2 lakh received immediately. IRR accounts for the timing of each receipt.
Setu Bank: the instrument performs its loss-absorption role
Issuance decision. Investors demand a 9% coupon on a ₹1,000 crore AT1 issue: hypothetically 6.5% benchmark plus 2.5% combined spread. The first call is year 5. The investor pays ₹10 lakh at par.
Performance. Years 1 and 2 coupons are paid. At the start of year 3, assume recognised losses reduce CET1 from ₹8,000 crore to ₹6,000 crore, with RWA unchanged at ₹1,00,000 crore: the ratio falls from 8.00% to 6.00%, below the stipulated 6.125% trigger.
Separately assume the governing terms and applicable action result in a 40% permanent write-down. This percentage is an explicit teaching assumption—not a regulatory write-down calculated from the ratio. The investor’s principal falls from ₹10 lakh to ₹6 lakh.
| Year | Event | Investor cash flow |
|---|---|---|
| 0 | Purchase | −₹10,00,000 |
| 1 and 2, each | Coupon paid | +₹90,000 |
| Start of 3 | ₹4 lakh written off permanently | No cash receipt; claim reduced to ₹6 lakh |
| End of 3 | Assumed permitted coupon: ₹6 lakh × 9% | +₹54,000 |
| End of 3 | Sale at 90% of remaining ₹6 lakh principal | +₹5,40,000 |
This case assumes the post-write-down coupon is calculated on the reduced principal, is permitted and is paid. Real provisions can differ, including full write-off or conversion. It does not model PONV or the resulting regulatory/accounting capital-restoration calculation.
Discuss: is the 90% sale price 90% of the original investment?
No. It applies to the remaining ₹6 lakh claim. ₹6 lakh × 90% = ₹5.4 lakh, equivalent to only 54% of the original face value.
Compare the outcomes
| Measure | Pragati | Sahyadri | Setu |
|---|---|---|---|
| Initial investment / original coupon | ₹10 lakh / 9% | ₹10 lakh / 9% | ₹10 lakh / 9% |
| Horizon | 5 years | 5 years | 3 years |
| Total coupons received | ₹4.50 lakh | ₹3.60 lakh | ₹2.34 lakh |
| Redemption / sale proceeds | ₹10.00 lakh | ₹6.60 lakh | ₹5.40 lakh |
| Annual investor IRR | 9.00% | 0.46% | -9.14% |
Same advertised coupon, different realised outcomes. Coupon continuity, principal survival, holding period and exit price determine the return. These hypothetical paths illustrate mechanics, not expected returns or relative bank rankings.
LEARNING SECTION 09
Yes Bank: structure, legal authority and time
In March 2020, ₹8,415 crore of Yes Bank AT1 bonds were written off during reconstruction. This was a capital write-down, not simply a routine missed coupon.
AT1 write-off
Bombay High Court quashes action
Supreme Court upholds quashing
The judgment concerns the legality of the particular action; it does not abolish AT1 loss-absorption risk. Nor is it confirmation that every investor has already received repayment.
What loss-bearing terms did investors accept? Who had the authority to act? What is the resulting claim and payment timeline?
Case status as of 20 October 2026: Indian Express, Supreme Court ruling. Legal outcomes and implementation may change; this case note is not a statement of current recoveries.
LEARNING SECTION 10
Analyse the instrument before the advertised yield
Bank finances
- CET1 and headroom above applicable requirements
- Asset quality, provisioning and concentration
- Recurring earnings and distributable resources
- Deposit stability and funding liquidity
Instrument terms
- Coupon cancellation and reset formula
- Call dates, approval and redemption conditions
- Trigger, write-down and conversion provisions
- Issue rating, ranking and executable exit quotes
A public-sector bank name is not an explicit sovereign guarantee of an AT1 issue. An instrument rating is not the same as a guarantee. A listed instrument may still be hard to sell.
LEARNING SECTION 11
Test your understanding and continue learning
1. ₹5 lakh face value at 8%: one annual coupon cancelled. How much is lost?
₹40,000 scheduled coupon. It does not automatically accrue for future payment.
2. CET1 ₹6,500 crore; RWA ₹1,00,000 crore. After a ₹500 crore loss?
Assuming unchanged RWA and no other effects: ₹6,000 ÷ ₹1,00,000 = 6.00%, below the illustrative 6.125% threshold.
3. Does non-exercise of a call automatically constitute default?
No. An issuer option is different from a contractual maturity obligation.
4. Can liquidation ranking alone predict the timing of AT1 losses?
No. Pre-liquidation trigger and PONV provisions must also be examined.
5. Can a profitable bank’s AT1 price fall?
Yes. Required yields, credit spreads, liquidity and expectations of a call can change independently of current profit.
Primary reading
- RBI commercial-bank capital adequacy directions — official landing page identifies an update dated 7 October 2026; apply the latest text and issue terms.
- Basel Framework: definition of capital — international principles; domestic implementation can differ.
- Bond Primary Market Pricing — benchmark yields, spreads and pricing.
- Bond Prices and Yields — strengthen the valuation foundations.
Educational material. Numerical examples are hypothetical. Read the actual issue document and applicable rules; eligibility and distribution restrictions must be checked separately. This guide is not a recommendation to buy any security.