HomeCirculars › RBI/2010-11/409

RBI curbs UCB investments in Zero Coupon Bonds without sinking fund

Co-operative Banks
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: 18 Feb 2011  ·  Decoded by BankPulse: 20 Jun 2026, 10:45 IST
⏱ ~2 min read
📄 Official RBI source ↗
Quick answerRBI has barred Primary Urban Co-operative Banks from investing in Zero Coupon Bonds unless the issuer creates a sinking fund for accrued interest, invested in liquid investments/securities (Government bonds), to mitigate unrecognized credit risk.

What changed

RBI issued a new restriction on UCB investments in Zero Coupon Bonds (ZCBs). Banks can no longer invest in ZCBs unless the issuer sets up a sinking fund for all accrued interest and keeps it invested in liquid investments/securities (Government bonds). This supplements earlier instructions from January 2009 on non-SLR securities.

What it means for you

UCBs must now assess ZCB issuers' compliance with the sinking fund requirement before investing. This rule aims to prevent hidden credit risk buildup, especially in long-term ZCBs, which could pose systemic issues if large-scale investments go unrecognized until maturity. Banks should ensure new investments meet the condition.

What you must do

Who it affects

Primary (Urban) Co-operative Banks, Treasury departments of UCBs, Credit risk management teams in UCBs, Issuers of Zero Coupon Bonds, including corporates and NBFCs

What is a sinking fund in this context?

A sinking fund is a separate pool of money set aside by the ZCB issuer to cover all accrued interest over the bond's life. It must be invested in liquid investments/securities (Government bonds) to ensure funds are available at maturity.

Does this circular apply to all cooperative banks?

It specifically applies to Primary (Urban) Co-operative Banks, as addressed in the circular. Other types of cooperative banks may need to check separate RBI instructions.

What happens if a UCB already holds ZCBs without a sinking fund?

The circular does not explicitly address existing holdings, but banks should review their portfolios for compliance and consider the heightened credit risk. RBI may expect proactive risk management.

Key dataSee the live numbers behind this topic: RBI Penalty Tracker, NPA / Asset-Quality Tracker — updated from official RBI data.
Key termsPlain-English definitions of terms in this circular — see the full Indian banking glossary. KYC / AML · Gross NPA (GNPA) · Deposit insurance (DICGC) · Scheduled Commercial Bank (SCB)
Track this rule
⏳ How this rule evolved — History Map →Full RBI rulebook crosswalk →
AI-drafted · 3-model AI consensus fact-check · under the editorial review of Vikram Jain · decoded & published by BankPulse · 20 Jun 2026, 10:45 IST
Official RBI source: https://www.rbi.org.in/Scripts/NotificationUser.aspx?Id=6268&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.