Repurchase agreement

In a repurchase agreement, or repo, one party sells a security (usually a government bond) to another and agrees to buy it back for a slightly higher price at a future date (usually the following day). This is a form of borrowing and the difference between the two prices is essentially the interest rate on the debt. The repo market is huge, with an estimated size of more than $4trn in America alone. It is the way many market participants finance themselves in the short term.