TREPS and Market Repo: How Banks Fund Overnight Positions (TIRM 2026)

Every scheduled commercial bank in India needs a reliable way to borrow or lend cash overnight without disturbing its long-term investment book, and TREPS and market repo are the two instruments a treasury desk reaches for first. Both let a bank raise short-term funds against government securities, but the mechanics, the counterparty risk, and the settlement process differ enough that JAIIB and CAIIB candidates routinely mix them up in the exam hall. This article breaks down how each instrument works, who runs the market, and why the choice between the two matters for a bank's liquidity and balance sheet.

🏛️ What Is TREPS?

TREPS stands for Tri-Party Repo Dealing System, a platform on which eligible participants borrow and lend funds overnight (or for a short tenor) against government securities, with the Clearing Corporation of India Ltd (CCIL) acting as the tri-party agent. In a tri-party structure, the two counterparties agree only on the amount and the tenor; CCIL selects the actual basket of eligible securities from the borrower's holdings, values the collateral, applies the margin, and handles substitution if a security needs to be swapped mid-tenor.

The defining feature of TREPS is that trades are anonymous and order-matched on a common platform, and CCIL interposes itself as the central counterparty (CCP) to every deal through novation. Once a trade is matched, each lender's exposure is to CCIL, not to the unknown borrower on the other side, and vice versa. This CCP guarantee is why TREPS became the preferred venue for day-to-day collateralized overnight liquidity management after RBI phased out the earlier Collateralized Borrowing and Lending Obligation (CBLO) mechanism in favour of the tri-party model. For the broader mechanics of how this money market segment functions alongside other short-tenor instruments, see the Money Market chapter.

💡 Exam Tip: If a question describes a trade where the counterparty is unknown and a third agent selects and manages the collateral, it is describing TREPS, not market repo.

🤝 Market Repo Explained

A market repo (also called a bilateral or negotiated repo) is a repurchase transaction in which two counterparties deal directly with each other. The borrower sells a specific government security to the lender with an agreement to repurchase it at a pre-agreed price on a future date, and the two sides negotiate the rate, tenor, haircut, and the exact security to be pledged themselves, rather than letting a central agent pick from a basket.

Because the security is specifically chosen rather than substituted from a general basket, market repo is the natural route when a bank or primary dealer needs to borrow a particular security — for instance, to cover a short position built up during trading, or to source a scarce on-the-run security for delivery obligations. Settlement of government securities and funds still flows through the RBI's securities settlement infrastructure, but the counterparty exposure in a market repo generally remains bilateral rather than being guaranteed by a central counterparty in the way TREPS trades are. This distinction connects closely to how banks manage short-term cash more broadly — the call money market in India operates on a similar overnight logic, except that call money is unsecured while both TREPS and market repo are fully collateralized.

⚠️ Common Mistake: Do not assume market repo is uncollateralized. Both TREPS and market repo are secured against government securities; the difference lies in how the collateral and counterparty are matched, not in whether collateral exists.

⚖️ TREPS vs Market Repo: Key Differences

The table below summarizes the practical differences a treasury or risk professional needs to keep straight, especially for scenario-based exam questions that describe a transaction and ask you to identify the instrument.

Both markets sit within the broader universe of money market instruments that a bank's treasury uses to smooth out daily cash mismatches, and both feed into the overnight rate that the Reserve Bank of India watches most closely for monetary policy transmission — the collateralized segment anchored by TREPS and market repo activity, alongside the unsecured call segment. A treasury dealer choosing between the two is really choosing between certainty of settlement and flexibility of collateral: TREPS gives up control over which exact security gets pledged in exchange for a CCP guarantee and deep, anonymous liquidity, while market repo gives up that guarantee in exchange for the ability to name the security and the counterparty. Exam questions often test this trade-off by describing a scenario — a bank needing to cover a short sale in a specific bond, or a bank simply parking surplus cash overnight — and asking which instrument fits.

🛡️ Risk, Regulation and Back-Office Angle

From a risk-management standpoint, both TREPS and market repo carry collateral (price) risk, and market repo additionally carries residual counterparty risk since there is no CCP guarantee. Treasury risk teams apply haircuts to the market value of the pledged security to cushion against price movement over the tenor, monitor mark-to-market exposure, and set internal limits on repo counterparties for bilateral deals. These practices sit at the core of the Risk Analysis and Control chapter, which covers how banks quantify and limit exposure across treasury products.

Operationally, every repo or TREPS deal moves through the classic front office/mid office/back office chain: the dealer executes the trade, mid office checks it against limits, and back office confirms the trade and ensures the security and funds leg settle correctly (delivery-versus-payment). Errors in this chain — a mismatched security ISIN or an unconfirmed substitution — are a recurring theme in operational risk case studies, covered in detail in the Front, Mid and Back Office Operations chapter. On the compliance side, RBI's regulatory framework governs which entities may participate in TREPS and repo, the eligible collateral, and reporting obligations — ground covered in the Regulations, Supervision and Compliance chapter.

📌 Key Takeaway: TREPS = anonymous, CCP-guaranteed, basket collateral. Market repo = bilateral, no CCP guarantee, specific collateral. Both are secured, overnight-to-short-tenor instruments built on government securities.

Because collateral quality drives both instruments, it helps to revisit how a bank classifies and marks its investment book in the first place — see the guide on SLR and non-SLR investments for how eligible government securities fit into a bank's statutory and repo-eligible holdings. If your revision plan also covers how a bond's price is quoted before it becomes repo collateral, the article on clean price vs dirty price is a useful companion read, and for the institutions that actively use both TREPS and market repo as core funding tools, the piece on primary dealers in India fills in the participant picture.

🧠 Practice MCQs: TREPS and Market Repo

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❓ Frequently Asked Questions

TREPS and market repo both let a bank turn its government securities holdings into same-day liquidity, but they sit at opposite ends of the anonymity-versus-specificity spectrum: one gives you a CCP guarantee and a basket of collateral, the other gives you a named counterparty and a chosen security. Getting this distinction right is a recurring theme across TIRM scenario questions. Revisit the full Treasury Investment and Risk Management topic hub for related concepts, or test your recall now with a full-length CAIIB mock on iibf.store/tests.