Why Repo Rates Can Spike at Quarter-End
Summary
The discussion links quarter-end repo rate spikes to banks’ balance-sheet constraints. Quarter-end figures feed into profitability measures such as return on assets, and bank management may impose internal limits on balance-sheet usage at those dates. When banks make less funding available, overnight repo rates can become unstable.
Some borrowers respond by arranging term repo funding in advance, while others accept overnight exposure because not every quarter-end is volatile. The question also notes that Treasury securities settling after quarter-end fall outside that month-end balance-sheet calculation. The reply confirms that timing point but does not detail regulatory penalties, quantify the rate effect, or explain how a borrower should choose between term and overnight funding. The account is a qualitative explanation, not a general forecast of repo conditions.
Key ideas
- Quarter-end balance-sheet limits can reduce banks’ willingness to provide repo funding.
- Reduced funding availability can make overnight repo rates unstable.
- Borrowers may term out funding to reduce exposure to quarter-end rate spikes.
- Some borrowers retain overnight exposure because quarter-end volatility is not guaranteed.
- Securities settling after quarter-end are excluded from that month-end balance-sheet snapshot.
Tags
Full text
# Quarter-end repo spike (Why not lock in longer repo) # Quarter-end repo spike (Why not lock in longer repo) There has been a lot of discussion regarding quarter end repo spikes as dealers reduce their balance sheet. I've been reading it all over Bloomberg and I saw overnight GC as high as 3.6% on my screens. Is this the result of banks pulling funding from repo (i.e. not lending cash and taking in collateral) due to regulation? What's the penalty if they don't reduce balance sheet? Why don't borrowers just lock in a longer term repo rate so they're not exposed to these funding costs? Lastly, I learned that it also helps that the new Treasury securities (2y, 5y, and 7y) auctioned this past week settles on 4/1. Since this is after quarter-end, it would not be included in the regulatory calculation. In addition, there's no exchange of cash until 4/1 since these issues are purchased on a when-issued basis. ## Answer by dm63 (score 4, accepted) https://quant.stackexchange.com/a/44833 All banks have limitations on accounting balance sheet usage. The sensitivity is increased on quarter end dates, which are used to calculate various profitability measures such as return on assets. Usually a limit for each quarter end is imposed internally by management. Because of these limits, banks make less funding available and therefore the overnight repo rate at month end can get unstable. Borrowers understand this and some of them do term out their borrowing, but not all. Some prefer to take the risk- after all , not all quarter ends have been volatile. It’s true that bonds settling 4/1 will not be on March end balance sheet.
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