Reverse Repurchase Agreement
A Reverse Repurchase Agreement (reverse repo) is the mirror transaction to a repo: the party that provides cash purchases securities from a counterparty under an agreement to resell them at a higher price on a specified future date, effectively lending cash on a secured basis and earning interest equal to the repo rate for the transaction term.
In any repo transaction, the terminology depends on perspective. For the party borrowing cash and pledging collateral, the transaction is a repo. For the party lending cash and receiving collateral, the exact same transaction is a reverse repo. The mechanics are identical; the label depends on which side of the trade one is describing.
The Federal Reserve's Overnight Reverse Repo Facility (ON RRP) is the most widely discussed reverse repo mechanism in U.S. markets. Under this facility, eligible counterparties — primarily money market mutual funds and government-sponsored enterprises — lend cash to the Federal Reserve overnight, receiving U.S. Treasury securities as collateral and earning a policy-determined interest rate. From the Fed's perspective, it is conducting reverse repos: buying securities temporarily and lending them out for cash. From the counterparty's perspective, it is placing cash with the Fed on an overnight secured basis.
The ON RRP facility ballooned in importance from 2021 through 2023 as excess bank reserves flooded the financial system through the Fed's quantitative easing programs. Money market funds that struggled to deploy cash at positive yields in private markets flocked to the Fed's facility, which offered a guaranteed rate well above near-zero alternatives. Daily ON RRP usage peaked above $2.5 trillion in late 2022 before declining as Treasury bill supply increased and offered competitive yields.
In the private repo market, a firm acting as a reverse repo counterparty — lending cash and receiving securities — faces collateral management responsibilities. It must monitor the value of the collateral held, issue margin calls if security prices fall below agreed thresholds, and manage the return of collateral at maturity. For leveraged hedge funds and other participants, reverse repo positions form an important component of cash management and collateral transformation strategies.
Reverse repos are also used by dealers in securities financing: a dealer may conduct a reverse repo to borrow specific securities (particularly on-the-run Treasury issues) needed to cover a short position, simultaneously lending cash to the holder of those securities. This securities borrowing dimension of the reverse repo market is closely linked to Treasury market functioning and short-selling activity in fixed income.
The systemic significance of reverse repos became clear in the 2008 financial crisis, when the collapse of confidence in certain collateral types caused repo and reverse repo markets to seize. Understanding reverse repos is therefore essential not only for institutional cash managers but for anyone seeking to understand the mechanics of modern central bank monetary operations and the plumbing of the U.S. financial system.