Repurchase Agreement
A Repurchase Agreement (repo) is a financial transaction in which one party sells securities to a counterparty with a simultaneous contractual commitment to repurchase those same securities at a specified future date and at a higher repurchase price, with the price difference representing interest — the repo rate — on what is economically a collateralized short-term loan. Repurchase agreements are the primary mechanism for short-term secured borrowing in financial markets, used extensively by banks, broker-dealers, central banks, and hedge funds for liquidity management, portfolio leverage, and monetary policy implementation.
Key takeaways
- From the cash borrower's perspective, a repo is a sale and repurchase; from the cash lender's perspective, the same transaction is a reverse repo (a purchase and resale).
- Term repos can range from overnight to several months; tri-party repos involve a custodian bank that manages collateral allocation and marking, reducing operational burden for counterparties.
- Haircuts on collateral protect cash lenders from collateral price declines between the sale and repurchase date, typically 0–2% for government securities and 5–20%+ for lower-rated or less liquid collateral.
- Special repo: when there is specific demand to borrow a particular security (e.g., on-the-run Treasuries), the repo rate for that security trades at a discount to general collateral repo rates, reflecting the premium lenders pay for access to the specific security.
- Repurchase agreements create off-balance-sheet financing concerns when improperly disclosed; the FASB's ASC 860 governs when repos are recorded as sales versus secured borrowings on the balance sheet.
Explanation
The repurchase agreement market is among the largest and most critical segments of the global financial system, with approximately $4–5 trillion in outstanding U.S. repo balances at any given time. Despite its importance, repo is often misunderstood because the same transaction has different names from the perspective of the two counterparties: what one party calls a 'repo' (selling and agreeing to repurchase) is simultaneously a 'reverse repo' for the other party (buying and agreeing to resell). This naming convention can create confusion in financial reporting and communications.
The legal structure of a repo is technically a sale and forward purchase, not a secured loan — a distinction that matters in insolvency proceedings. Under U.S. bankruptcy law and the automatic stay provisions, most repo transactions are exempt from the automatic stay that prevents creditors from seizing collateral when a debtor files for bankruptcy. This 'safe harbor' means that a repo counterparty can liquidate its collateral immediately upon the seller's default, without waiting for bankruptcy proceedings to conclude. The safe harbor is intended to prevent repo market disruptions in financial crises but has been criticized for incentivizing excessive repo financing and reducing the orderly resolution of insolvent institutions.
Tri-party repo, which accounts for roughly half the U.S. repo market, uses a custodian bank (JPMorgan or Bank of New York Mellon) to manage collateral allocation, valuation, and margin calls on behalf of the two transacting parties. The custodian automatically substitutes collateral as securities mature or fall outside agreed parameters, reducing operational risk. Most money market fund repo exposure is executed as tri-party, given the funds' need for high-quality, efficiently managed collateral without the operational burden of bilateral settlement.
The central bank repo market is distinct from the commercial repo market and serves as the primary monetary policy tool for central banks. The Federal Reserve's Open Market Desk conducts repo operations to add or drain reserves from the banking system, directly targeting the federal funds rate. The Fed's Overnight Reverse Repo Facility (ON RRP) allows eligible counterparties (money market funds, GSEs) to lend to the Fed at the administered ON RRP rate, effectively setting a floor under money market rates. During the post-QE period when excess bank reserves were abundant, the ON RRP facility attracted over $2 trillion in daily usage, absorbing excess cash and supporting the rate corridor.
Formula
Repurchase Price = Sale Price × (1 + Repo Rate × Days/360)
Example
A primary dealer bank needs overnight financing for its $2 billion inventory of 10-year Treasury notes. The bank enters into an overnight repo: it sells the Treasuries to a money market fund for $1.996 billion (reflecting a 0.2% haircut on $2 billion market value) and agrees to repurchase them the next morning for $1.996 billion plus one day's interest at the overnight GC repo rate of 5.30%. The interest payment is: $1.996B × 5.30% / 360 = $294,378. The following morning, the bank pays $1,996,294,378 to reacquire its Treasuries. The money market fund has earned a secured, overnight return of $294,378 on $1.996 billion — an annualized yield of 5.30% with Treasury collateral. The bank has financed its inventory at 5.30%, which it compares against the 10-year Treasury yield of 4.45% — an inverted carry of -85 basis points that it must offset through dealer bid-ask spread income or other position profitability.
Related terms
Basis Bid Ask Spread Central Bank Custodian Default Federal Funds Rate Floor Haircut Investment Grade Investment Grade Bond Leverage Liquidity