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Hedge Funds and the Treasury Cash-Futures Disconnect

Daniel Barth () and Robert Kahn
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Daniel Barth: Board of Governors of the Federal Reserve System

No 21-01, Working Papers from Office of Financial Research, US Department of the Treasury

Abstract: We document the rise and fall of an arbitrage trade among hedge funds known as the Treasury cash-futures basis trade. This trade exploited a fundamental disconnect between cash and futures prices of Treasuries. We show that in recent years a replicating portfolio of Treasury bills and futures has been overvalued relative to Treasury coupons, creating an opportunity for arbitrageurs. Using regulatory datasets on hedge fund exposures and repo transactions, we are able to both identify these arbitrage positions and speak to their aggregate size. We show that the basis trade became popular among hedge funds following 2016, rising to make up as much as half of all hedge fund Treasury positions and around a quarter of dealers' repo lending. We present a model that illustrates the reasons for the rise in the basis trade, and shows how the trade could contribute to financial instability. In March of 2020, many of the risks of the trade materialized as Treasury market illiquidity associated with the COVID-19 pandemic led to large sales of these basis trade positions among hedge funds. While Treasury market disruptions spurred hedge funds to sell Treasuries, the unwinding of the basis trade was likely a consequence rather than the primary cause of the stress. Prompt intervention by the Federal Reserve may have prevented the trade from accelerating the deterioration of Treasury market functioning. Our results underscore the importance of non-bank actors in the current structure of the Treasury market, and suggest this structure could create risks going forward.

Keywords: Treasuries; repo; futures; basis trade; hedge fund; securities dealers; liquidity (search for similar items in EconPapers)
Pages: 102 pages
Date: 2021-04-01
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Citations: View citations in EconPapers (22)

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