The Role of Repos in Monetary Policy Implementation
In the first two posts of this three-part series, we discussed private market participants that are active in repo markets for profit-making motives. Central banks are also active repo market participants, but their reasons often differ from those of private participants. In today’s post, we discuss how central banks use repos to manage liquidity in the financial system and implement monetary policy.
Who’s Borrowing and Lending in Repo Markets?
Repo markets play a vital role in the U.S. financial system. In this three-part series, we examine who participates in these markets, what trade-offs influence how different repo segments are structured, and why repos matter for monetary policy. Today’s post introduces repo transactions, focusing on the major private-sector participants and why they engage in these markets.
The Disappearing Overnight Drift
In a 2021 Liberty Street Economics post, we documented the “overnight drift”—a large, persistent return to holding U.S. equity futures in the narrow window between 2:00 and 3:00 a.m. Eastern time, when European equity markets open. Five additional years of data later, that pattern appears to have faded: the 2:00–3:00 window that previously generated roughly 3.7 percent per annum has averaged close to zero since 2021. In this post, we revisit the overnight drift in light of the post-publication sample and use our inventory-risk framework to ask which of three observable channels—the dispersion of closing order imbalances, the level of return variance, or the risk-bearing capacity of liquidity providers—accounts for the change.
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