Reverse Repurchase Agreement

A reverse repurchase agreement — or reverse repo — is the opposite side of a repurchase agreement. Rather than borrowing cash by selling securities, a party lends cash by purchasing securities with an agreement to sell them back at a higher price on a future date. Reverse repos are used to deploy excess cash earning a modest return, or by central banks to drain liquidity from the banking system.

How reverse repos work

A corporation has $500 million of excess cash and wants to earn a return without taking duration or credit risk. It conducts a reverse repo with a securities dealer: it lends $500 million in exchange for Treasury securities as collateral.

The dealer agrees to repurchase the Treasuries tomorrow for $500.1 million. The $100,000 spread (the reverse repo rate) is the return the corporation earns — approximately 0.02% daily or 7% annualized.

From the corporation’s perspective, it has lent cash, received safe collateral (Treasuries), and will receive the cash back plus interest tomorrow. This is an attractive use of temporary cash that would otherwise sit idle earning nothing.

Reverse repo as cash management

Corporations, mutual funds, and other investors use reverse repos as a cash management tool:

• Overnight cash — Excess cash that is not needed until tomorrow can be invested overnight in a reverse repo, earning a modest return.
• Short-term cash — Cash that will not be needed for 1–3 months can be locked in a term reverse repo for a predetermined return.
• Collateral management — Some investors conduct reverse repos to temporarily borrow securities needed for transactions.

The advantage of reverse repos over Treasury bills or money-market funds is certainty and collateral control. The investor knows exactly what will be repurchased and at what price; there is no secondary market liquidity risk.

Federal Reserve reverse repos

The Federal Reserve conducts large-scale reverse repo operations to manage banking system liquidity and control short-term interest rates. When the Fed wants to reduce cash in the system, it can conduct reverse repos: it offers to purchase securities with an agreement to sell them back, draining cash.

The Fed’s reverse repo operations during 2019 reached historic levels, signaling stress in money markets. In 2021–2023, the Fed’s reverse repo usage soared above $2 trillion daily as the Fed drained cash post-QE.

These Fed operations influence overnight and short-term rates, making reverse repo a key monetary policy tool.

Haircuts and collateral quality

Reverse repos require overcollateralization (haircuts) to protect the cash lender. A $500 million cash loan against Treasury collateral might require $510 million of Treasury collateral (a 2% haircut). If the dealer defaults, the cash lender has $510 million of Treasuries to sell to recover the $500 million lent.

Haircuts vary by collateral type and market conditions. Treasury haircuts are minimal (1–2%); corporate bond haircuts are wider (3–5%); equity haircuts are very wide (20%+).

Reverse repos vs. Treasury bills

A reverse repo and a Treasury bill both provide safe, short-term cash deployment. Differences:

• Reverse repos offer slightly higher returns because they are collateralized by the lender; Treasury bills offer lower returns because they are sovereign debt.
• Treasury bills are liquid (trade in secondary markets); reverse repos are less liquid (typically held to maturity).
• Reverse repos require dealing with a counterparty; Treasury bills trade with primary dealers.

For investors seeking maximum safety and liquidity, Treasury bills are preferable. For investors willing to accept counterparty risk, reverse repos offer higher yields.

Comparison to repurchase agreements

From Party A’s perspective:

• Repo = “I sell securities for cash; I will repurchase them” (borrowing)
• Reverse repo = “I buy securities with cash; I will resell them” (lending)

These are the same transaction viewed from opposite sides. When a dealer is doing a repo (borrowing), the counterparty is doing a reverse repo (lending).

Risks and considerations

Counterparty risk — A reverse repo exposes the cash lender to the credit risk of the dealer. If the dealer fails before the reverse repo matures, the lender must liquidate the collateral at market prices, which might have fallen.

Collateral market risk — If collateral value declines (e.g., Treasury yields rise), the haircut protection decays. The lender is relying on the haircut to provide a buffer.

Refinancing risk — For longer-term reverse repos, rollover risk exists at maturity.

See also