---
description: "A repurchase agreement strategy that borrows or lends cash at a preset interest rate for 1 day to 6 months using securities as collateral, providing immediate liquidity."
tags: [cash, fixed-income, collateral, short-term]
---

# Repurchase Agreement (REPO)

**Section**: 17.4 | **Asset Class**: Cash | **Type**: Collateralized lending / Cash equivalent

## Overview

A repurchase agreement (REPO) is a cash-equivalent asset that provides immediate liquidity at a preset interest rate for a specific period of time in exchange for another asset used as collateral. A REPO strategy amounts to borrowing (or lending) cash with interest in exchange for securities, with the commitment of repurchasing them from (or reselling them to) the counterparty at the end of the term. This type of transaction typically spans from 1 day to 6 months.

## Construction / Mechanics

**From the borrower's perspective (classic repo):**
- The borrower sells securities to the lender at a spot price
- Simultaneously agrees to repurchase those securities at a future date at a higher price
- The difference in prices represents the repo interest (the "repo rate")
- The securities serve as collateral; the lender has recourse to them if the borrower defaults

**From the lender's perspective (reverse repo):**
- The lender buys securities and simultaneously agrees to resell them at a later date
- Effectively a collateralized cash loan earning the repo rate
- Counterparty credit risk is mitigated by holding the collateral

**Mechanics summary:**
- Term: overnight (O/N) to 6 months; "open" repos have no fixed term
- Collateral: typically government securities, though agency bonds and other high-grade paper are used
- Haircut: the collateral is valued at a discount to market price to provide a buffer against collateral price declines

## Return Profile / Objective

The strategy earns (or pays) the repo rate, which is typically close to but slightly below the risk-free rate (for general collateral) or can be significantly below (even negative) for "special" securities in high demand. The primary objective is efficient short-term cash management — deploying idle cash at near-risk-free rates while maintaining near-immediate liquidity.

## Key Parameters / Signals

- **Repo rate**: the annualized interest rate on the transaction; general collateral (GC) rate vs. specific/special rates
- **Haircut**: discount applied to collateral value (e.g., 2% for Treasuries, higher for lower-grade collateral)
- **Term**: overnight, term (fixed date), or open
- **Collateral type**: determines applicable haircut and rate; GC repos use any acceptable security vs. specific repos tied to a named security
- **Margin calls**: triggered if collateral value falls below the required threshold during the term

## Variations

- **Reverse repo**: the lender's side; used by central banks as a monetary policy tool and by money market funds as an investment
- **Tri-party repo**: a clearing bank acts as intermediary, handling collateral management for both parties
- **Securities lending**: conceptually similar; the security owner lends it out for a fee, receiving cash or other securities as collateral
- **GC pooling**: centralized clearing of general collateral repos to improve netting and efficiency

## Notes

REPOs are a foundational instrument in money markets and are used by banks, broker-dealers, money market funds, and central banks. The 2008 financial crisis revealed the fragility of repo markets when collateral quality deteriorated rapidly (the "run on repo"). Counterparty credit risk, collateral quality, and the potential for "fire-sale" dynamics during stress are the primary risk considerations. REPOs are conceptually similar to pawnbroking but operate in institutional markets at vastly larger scale.