HomeCirculars › RBI/2010-11/219

RBI curbs bank investments in zero coupon bonds

Live · in forceNo withdrawal recorded as of 20 Jun 2026. Reviewed by Vikram Jain; always verify against the official RBI source below.
Issued by RBI: 29 Sep 2010  ·  Decoded by BankPulse: 20 Jun 2026, 12:37 IST
⏱ ~2 min read
📄 Official RBI source ↗
Quick answerRBI has barred banks from investing in zero coupon bonds unless issuers create a sinking fund for accrued interest, invested in liquid securities like government bonds. Banks must also set conservative limits on such investments to mitigate unrecognized credit risk.

What changed

RBI issued a circular prohibiting banks from investing in zero coupon bonds unless the issuer builds a sinking fund for all accrued interest and keeps it in liquid investments or government securities. Banks are also required to set conservative limits on their ZCB investments.

What it means for you

This move addresses the risk of credit exposure going unrecognized until maturity, especially for long-term ZCBs, which could pose systemic issues if large-scale. Banks must now ensure that the credit risk is mitigated through a sinking fund mechanism, reducing the potential for sudden defaults. Lenders will need to reassess their investment strategies and limit exposure to such instruments.

What you must do

Who it affects

All commercial banks (excluding Regional Rural Banks), Treasury departments, Risk management teams, Credit and investment committees

Why did RBI ban investments in zero coupon bonds without a sinking fund?

RBI noted that ZCBs allow credit risk to go unrecognized until maturity, which can be significant for long-term bonds and pose systemic risks if done on a large scale. The sinking fund requirement ensures that accrued interest is set aside in liquid assets, mitigating this risk.

What are the key conditions for banks to invest in ZCBs now?

Banks can only invest if the issuer creates a sinking fund for all accrued interest and keeps it invested in liquid investments or government securities. Additionally, banks must set conservative limits on their total ZCB exposure.

Does this circular apply to all banks?

It applies to all commercial banks except Regional Rural Banks (RRBs).

Track this rule
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AI-drafted · 3-model AI consensus fact-check · under the editorial review of Vikram Jain · decoded & published by BankPulse · 20 Jun 2026, 12:37 IST
Official RBI source: https://www.rbi.org.in/Scripts/NotificationUser.aspx?Id=6019&Mode=0 — Plain-English summary by BankPulse (bankpulse.ai), reviewed by Vikram Jain. Independent platform, not affiliated with the Reserve Bank of India; never reproduces RBI text verbatim.