Repo Trading Strategies: Matched Book, Credit Intermediation & Yield Curve Plays

Published: June 24, 2026

Article by Ryan O'Connell, CFA, FRM

Repo desks don’t just finance positions — they generate alpha. Beyond basic repurchase agreement mechanics, professional traders use matched book strategies, credit intermediation arbitrage, and yield curve plays to extract profit from the repo market itself. This guide covers the core trading strategies employed by institutional repo desks, with worked examples from real market conditions.

What Is Matched Book Trading?

Matched book trading is market-making in repo. A dealer runs a “matched book” by simultaneously entering into repos and reverse repos across different securities, counterparties, and tenors. Despite the name, the book is rarely actually matched — dealers deliberately mismatch positions to express views on interest rates and collateral scarcity.

Matched book traders typically engage in three types of trades:

How the Matched Book Works

The matched book desk sits at the intersection of cash and collateral markets. On any given day, the desk might:

• Borrow cash via repo (pledging securities as collateral)
• Lend cash via reverse repo (receiving securities as collateral)
• Run duration mismatches between the two sides
• Hold positions in anticipation of rate or collateral moves

Because government bond repo typically trades below unsecured interbank rates (reflecting the security’s credit quality), the desk can intermediate between secured and unsecured markets. A creditworthy dealer can borrow at GC rates and lend in the interbank market at a spread.

Taking a View on the Yield Curve

In a positively sloped repo curve, the conventional approach is to fund short: borrow at the short end (e.g., one week) and lend at the long end (e.g., three months). The desk continuously rolls the short-term funding over the longer lending period, capturing the term premium.

In an inverted curve, the strategy reverses: fund long by borrowing at longer tenors (where rates are lower) and lending at the short end. An inverted repo curve often signals market expectations of falling short-term rates, making the long funding lock-in attractive.

Credit Intermediation Trades

Credit intermediation exploits the spread between repo rates for different collateral qualities, or between secured repo and unsecured money markets. These trades are functionally credit arbitrage — the dealer captures the spread between markets while managing the credit exposure.

GC to CD Arbitrage

The simplest credit intermediation trade involves general collateral and bank certificates of deposit:

1. Repo out government securities at the GC rate (below Libor)
2. Use the cash proceeds to purchase bank CDs trading at a smaller spread below Libor
3. Earn the differential between the CD yield and the repo funding cost

For example, if 3-month GC repo trades at Libor minus 15 bps and clearing bank CDs trade at Libor minus 5 bps, the dealer earns a 10 basis point spread on the cash amount. The trade is not risk-free — it carries credit exposure to the CD issuer — but it converts secured funding into a higher-yielding unsecured investment.

Stock Loan to Repo Arbitrage

A more sophisticated arbitrage exploits the intersection of stock lending and repo markets. This requires relationships in both markets and careful attention to fee structures.

Yield Curve Spread Trades with Repo Funding

Beyond pure repo plays, the repo desk supports relative value trades in the underlying bond market. When a trader believes the yield spread between two bonds will change, repo provides the funding mechanism to express that view.

Bond Spread Trade Example

A yield curve spread trade is market-neutral on direction — it profits from changes in the shape of the curve, not its level. The classic structure is a duration-weighted long/short position funded via repo.

The sizing ratio (£10M vs. £3.23M) is determined by the relative basis point values of the two bonds. Duration-weighting ensures the position is neutral to parallel shifts in the curve — profit and loss come purely from curve reshaping.

Cross-Market Spread Trades

The same logic extends across markets. A trader expecting the spread between UK gilts and German bunds to widen can:

1. Sell the gilt and fund the short via reverse repo in the gilt market
2. Buy the bund and finance the long via repo in the bund market
3. Duration-weight the positions to neutralize parallel rate moves

Cross-market trades add currency risk to the equation. If the gilt/bund spread widens as expected but sterling weakens significantly against the euro, currency losses can offset or exceed the spread gains. Traders either hedge the FX exposure (adding cost) or take a concurrent view on the exchange rate.

Repo and Futures Basis Trading

The repo rate is central to cash-and-carry arbitrage in bond futures. The implied repo rate — the financing rate embedded in the futures price — should broadly converge with the actual repo rate for the cheapest-to-deliver (CTD) bond after adjusting for delivery options, margins, and transaction costs. When they diverge significantly, traders can:

• Buy the basis (positive basis): Buy the CTD bond, fund in repo, sell the futures contract
• Sell the basis (negative basis): Sell the CTD bond, cover in reverse repo, buy the futures contract

Basis trades are not risk-free arbitrage — the CTD can switch, the bond may go special (distorting repo funding costs), and there’s margin and delivery risk. But they’re a core strategy for desks with access to both cash repo and futures markets.

Hedging Interest Rate Gaps

When a repo position creates an interest rate gap (mismatch between asset and liability maturities), traders use off-balance-sheet instruments to hedge:

• Interest rate futures — A strip of short-term interest rate futures (e.g., SOFR futures, short sterling futures) can hedge the gap. Buy contracts equal to the exposure for the term of the gap; rate changes are offset by futures price moves.
• Forward rate agreements (FRAs) — An OTC agreement to lock in a rate for a future period. The buyer notionally borrows at a fixed rate; on the fixing date, the difference between the agreed rate and the actual rate is cash-settled.
• Interest rate swaps — For longer-duration hedges, a swap exchanges fixed for floating payments on a notional principal. A trader long a fixed-rate bond can pay fixed in a swap, converting to a floating-rate exposure that offsets the repo funding cost.

The choice depends on tenor, liquidity, and basis risk tolerance. Futures are liquid and exchange-traded but may not match the exact gap period. FRAs offer customization but carry counterparty exposure. Swaps provide the most flexibility for longer-dated hedges but require ISDA documentation and margin management.

Repo Desk Organization and Risk Management

The repo desk is a critical infrastructure function on any fixed income trading floor. It supports multiple business lines:

• Bond sales desk — financing customer positions and covering shorts
• New issue hedging — funding inventory during syndication
• Swaps and options desks — funding hedge positions
• Proprietary trading — executing desk-level strategies

Because the repo desk deals in a short-term interest rate product, it falls under the bank’s overall asset-liability management (ALM) policy. Key risk parameters include:

Clear communication between the repo desk and other trading areas is essential. The desk needs real-time visibility into bond positions, short-cover needs, and hedging requirements across the floor.

Matched Book Trading vs. Proprietary Trading

While related, matched book trading and proprietary trading represent distinct activities with different risk profiles and organizational positioning.

In practice, the line blurs. A matched book desk that takes aggressive yield curve views starts to look like prop trading. Post-2008 regulations (the Volcker Rule in the US, similar rules elsewhere) have forced clearer separation, but repo desks still retain scope for position-taking within their market-making mandate.

Common Mistakes in Repo Trading

Even experienced traders make errors in repo strategy. Here are the most common pitfalls:

1. Ignoring Roll Risk — Traders who fund long-term positions with short-term repo assume they can roll the funding at similar rates. In stressed markets, roll rates can spike or funding can disappear entirely. The September 2019 repo spike saw overnight rates jump to 10% with little warning.

2. Underestimating Credit Risk in Arbitrage — The stock loan to CD trade described above is not risk-free. The CD leg carries unsecured credit exposure. A spread that looks attractive can become a loss if the CD counterparty is downgraded or defaults.

3. Confusing Specialness with Market Direction — A bond going special in repo means it’s in demand as collateral — it doesn’t necessarily mean the bond will appreciate in price. Specialness is a funding phenomenon, not a price signal.

4. Neglecting Capital Costs — Some arbitrage profits disappear when you account for the capital required to support the trade. Risk-weighted asset charges, balance sheet costs, and leverage ratio constraints can eliminate seemingly attractive spreads.

5. Failing to Set Stop-Losses — Spread trades can move against you for longer than your funding or risk budget allows. Disciplined traders set stop-losses at typically half the profit target — if you’re aiming for a 10 bps spread move, exit at 5 bps against.

Limitations of Repo Trading Strategies

Repo trading strategies face several structural constraints that limit their applicability and profitability:

These limitations don’t make repo trading strategies unviable — they make proper risk management essential. Size positions within credit limits, maintain liquidity buffers, and ensure your infrastructure can handle the operational demands of multi-market trading.