STRIPS in Government Securities: Stripping, Reconstitution and Uses (IIBF TIRM)

A plain coupon-bearing Government of India dated security pays interest every six months and returns the principal at maturity — two separate cash flow streams bundled into one instrument. STRIPS in government securities break that bundle apart. Each interest payment and the final principal repayment is converted into its own tradable, zero coupon security, so a single 10-year G-Sec can yield up to twenty-one separate instruments — twenty coupon strips and one principal strip. For CAIIB TIRM candidates and treasury desks, understanding how stripping, reconstitution and pricing work is essential, because STRIPS sit at the intersection of the money market, capital market and treasury risk-management syllabus areas.

📊 What Are STRIPS and How Stripping Works

STRIPS stands for Separate Trading of Registered Interest and Principal Securities. The mechanism takes one eligible, fixed-rate, non-callable Government of India dated security and separates its cash flows into independent zero coupon instruments. The coupon due on each payment date becomes a Coupon STRIPS (also called an Interest-Only or C-STRIPS), and the final redemption amount becomes a Principal STRIPS (P-STRIPS). Every strip is registered and traded separately, each carrying its own ISIN and its own maturity date corresponding to the original cash flow date.

Not every security qualifies. Only specified fixed-coupon, non-callable dated securities notified as eligible under RBI's Government Securities (STRIPS) Scheme can be stripped; Treasury Bills, State Development Loans, floating rate bonds and special securities are excluded because they either already carry no coupon or their cash flows are not fixed and predictable enough to strip cleanly. A bank or Primary Dealer holding an eligible security in its Subsidiary General Ledger (SGL) account submits a stripping request, and RBI's depository system converts the parent security into the corresponding set of strips, extinguishing the original security in the process.

💡 Exam Tip: Remember the rule as "fixed, non-callable, dated" — if a security has a floating coupon or an embedded call option, it cannot be stripped.

🏦 Reconstitution and Trading via RBI's NDS Platform

Stripping is reversible. Reconstitution is the mirror-image process: a market participant who acquires the exact set of P-STRIPS and C-STRIPS that map to a single original security can surrender them and have RBI recombine them back into the coupon-bearing parent bond. This keeps the strip market and the parent-bond market linked by arbitrage — if strips trade too cheap or too dear relative to the parent security's yield curve, participants strip or reconstitute to capture the difference, which keeps pricing broadly consistent.

All of this happens electronically through RBI's Negotiated Dealing System, with actual price discovery and trading occurring on the NDS-OM (order-matching) screen used by banks, Primary Dealers and other regulated participants. Settlement follows the standard G-Sec cycle through the Clearing Corporation of India Ltd (CCIL), with delivery-versus-payment against SGL accounts, so a strip settles exactly the way a normal dated security does even though its cash flow profile is completely different. This infrastructure is the same platform candidates studying the money market module encounter for outright G-Sec deals and repo.

Because stripping and reconstitution are administrative operations rather than fresh issuances, the total face value of government debt outstanding does not change — only its form. This is a key distinction examiners like to test: STRIPS do not create new government borrowing, they repackage existing borrowing into more granular cash flow instruments.

🎯 Why a Stripped Security Is a Zero Coupon Instrument

Once separated, every individual strip — whether it originated as a coupon or the principal — pays exactly one cash flow, on exactly one date, with nothing in between. That single-cash-flow structure is precisely what defines a zero coupon bond, so each STRIPS trades at a discount to its face value and accretes to par as maturity approaches, just like a Treasury Bill or a zero coupon corporate bond. There is no periodic coupon to reinvest, which has two consequences that matter for treasury pricing.

First, pricing a STRIPS is simpler in one sense: its value is just the present value of a single future cash flow, discounted at the zero coupon yield applicable to that specific tenor, derived from the government yield curve. Second, and more importantly for risk management, a STRIPS carries zero reinvestment risk on its own cash flow, because there is nothing to reinvest until the single payment date. Compare this with a normal coupon bond, where every six-monthly coupon must be reinvested at whatever rate prevails on that date — an uncertainty that erodes the certainty of the bond's realised yield over its life.

Candidates often assume STRIPS carry no risk at all because "zero coupon" sounds risk-free. In fact STRIPS still carry price risk — their value is highly sensitive to interest rate movements because duration equals maturity, with no intervening coupons to shorten it.

🛡️ Uses in Immunisation and Liability Matching

The zero coupon, single-cash-flow nature of STRIPS is exactly what long-horizon institutional investors need for immunisation strategies. Insurance companies and pension funds carry liabilities that mature on specific, often distant, future dates — a pension payout due in fourteen years, for instance. If they hold a coupon bond of matching maturity, they still face reinvestment risk on every coupon received along the way, and if rates fall after each coupon, the realised value at the liability date can fall short of what was projected.

A STRIPS of matching maturity removes that reinvestment uncertainty for the amount invested, because its single payment date and single cash flow can be lined up precisely against the liability date. This is the classic application of duration matching and cash flow matching covered under the treasury Risk Analysis and Control module — since a STRIPS' duration equals its remaining maturity (unlike a coupon bond, whose duration is always shorter than its maturity), it is a more precise immunisation tool for a known future obligation.

Treasury desks structuring liability-driven portfolios also use STRIPS to fine-tune portfolio duration without altering the overall size of the book, because buying or selling strips of different tenors adjusts the weighted-average duration more surgically than trading whole coupon bonds. This dovetails with the broader duration and convexity toolkit treasury officers use, discussed further in our guide to bond convexity in treasury portfolios. Any large strip position must still be sized within the desk's approved treasury risk limits and exposure ceilings, since a long-duration STRIPS book can breach duration or VaR limits faster than an equivalent coupon-bond book.

Remember: STRIPS duration equals time to maturity, because there is only one cash flow. This is the single biggest reason they are preferred for immunisation over coupon bonds of the same maturity.

🌱 Pricing, Reinvestment Risk and Market Development in India

Pricing a STRIPS in practice means reading it off the zero coupon yield curve built from the prices of traded government strips and parent securities together — each strip's discount reflects the market's view of interest rates for that specific tenor, rather than a blended yield across many cash flows as with a coupon bond. Because the market is thinner than the market for the parent coupon bonds, STRIPS at longer or more unusual tenors can trade with a wider bid-ask spread, so liquidity risk is generally higher for an individual strip than for the underlying security it came from.

India's STRIPS market has been available since 2010, when RBI permitted stripping and reconstitution of eligible dated securities, but trading volumes remain modest compared with the outright G-Sec and repo markets, and considerably smaller than developed STRIPS markets abroad. Demand is concentrated among insurance companies, pension and provident funds, and a handful of Primary Dealers running relative-value or immunisation books, rather than being a broad-based retail or bank-treasury instrument. Eligibility is restricted to specified fixed-rate, non-callable Central Government dated securities that RBI notifies from time to time, which keeps the strippable universe deliberately narrow and manageable for the settlement infrastructure.

For the exam, keep the eligibility, mechanics and duration properties distinct from other treasury instruments in the same syllabus band, such as money market instruments in treasury management, which are short-tenor and largely discount-based but are not created by stripping a coupon bond. See RBI's official primer on the government securities market for the regulatory description of the STRIPS scheme.

Feature	Regular Coupon G-Sec	STRIPS (P-STRIPS / C-STRIPS)
Periodic coupon paid	Yes, half-yearly	No, single cash flow only
Zero coupon instrument	No	Yes
Reinvestment risk on interim cash flows	✅ Present on every coupon	❌ Absent, only one payment date
Duration equals maturity	❌ Duration shorter than maturity	✅ Duration equals maturity
Created by RBI stripping process	Original issuance	Derived from parent security
Typical liquidity	Deeper, more liquid	Thinner, wider spreads

🧠 Practice MCQs: STRIPS in Government Securities

Q1. What does STRIPS stand for in the government securities market? (a) Separate Trading of Registered Interest and Principal of Securities (b) Structured Trading of Rated Interest Principal Securities (c) Standardised Treasury Reinvestment of Interest and Principal Securities (d) Segregated Transfer of Registered Investment Principal Securities

Answer: (a) — STRIPS is the process of separating a security's interest and principal cash flows into independently tradable instruments.

Q2. Which category of Government of India dated security is eligible for stripping? (a) Floating rate bonds (b) Fixed-rate, non-callable dated securities (c) Treasury Bills (d) State Development Loans

Answer: (b) — Only specified fixed-coupon, non-callable Central Government dated securities notified by RBI can be stripped.

Q3. A STRIPS instrument is best described as: (a) A coupon-bearing bond with variable interest (b) A zero coupon instrument with a single cash flow at maturity (c) A perpetual bond with no maturity (d) A floating rate note linked to repo

Answer: (b) — Because each strip pays only one cash flow on one date, it behaves exactly like a zero coupon bond.

Q4. STRIPS are particularly useful for which treasury or investment objective? (a) Generating periodic coupon income for liquidity management (b) Immunisation and matching of long-dated liabilities (c) Overnight funding through repo (d) Hedging foreign exchange exposure

Answer: (b) — Their duration equals maturity and they carry no reinvestment risk on interim cash flows, making them precise tools for liability matching.

Q5. Reconstitution of STRIPS refers to: (a) Splitting a coupon bond into separate interest and principal strips (b) Recombining the requisite principal and interest STRIPS back into the original coupon-bearing security (c) Revaluing STRIPS at market price daily (d) Converting STRIPS into equity shares

Answer: (b) — Reconstitution is the reverse of stripping: the exact matching set of strips is surrendered to recreate the parent security.

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Frequently Asked Questions

What is the difference between P-STRIPS and C-STRIPS?

P-STRIPS represents the stripped principal repayment cash flow of the original security, paid only at the original final maturity date. C-STRIPS (also called IO-STRIPS) represents each individual coupon cash flow, so a security paying coupons for ten years produces one C-STRIPS for every coupon date plus one P-STRIPS for the principal.

Can all Government of India securities be stripped?

No. Only specified fixed-rate, non-callable Central Government dated securities notified as eligible under RBI's STRIPS Scheme can be stripped. Treasury Bills, floating rate bonds, State Development Loans and special securities are not eligible.

Where do STRIPS trade and settle in India?

STRIPS are traded by banks, Primary Dealers and other regulated participants on RBI's NDS-OM platform and settle through the Clearing Corporation of India Ltd against Subsidiary General Ledger accounts, following the same delivery-versus-payment cycle used for other government securities.

Why do STRIPS have no reinvestment risk on their own cash flow?

Because each STRIPS pays exactly one lump sum on one date, there is no interim coupon to reinvest at an uncertain future rate. This is different from a regular coupon bond, where every coupon received must be reinvested and the reinvestment rate is unknown in advance.

Conclusion: Building STRIPS Into Your TIRM Preparation

STRIPS in government securities turn one coupon-bearing bond into a family of zero coupon instruments, each with a duration equal to its own maturity and none of the reinvestment risk that comes with periodic coupons. For TIRM candidates, the exam-relevant chain is simple: eligibility is restricted to fixed-rate, non-callable dated securities; stripping and reconstitution both run through RBI's NDS infrastructure and settle via CCIL; and the resulting zero coupon profile is what makes STRIPS valuable for immunisation and liability-driven treasury strategies, even though their thinner market means wider spreads than the parent bond. Revisit the Front, Mid and Back Office Operations chapter to see how strip trades are processed end to end, and browse more topics on our Treasury Investment and Risk Management tag hub. When you are ready to test yourself, take a full CAIIB TIRM mock covering this and related money-market topics.