Search Results
Working Paper
Runs and Flights to Safety: Are Stablecoins the New Money Market Funds?
Similar to the more traditional money market funds (MMFs), stablecoins aim to provide investors with safe, money-like assets. We investigate similarities and differences between these two investment products. Our key finding is that, like MMFs, stablecoins also suffer from “flight-to-safety” dynamics. This is manifested in net flows from riskier to safer stablecoins on days of crypto-market stress. The same flight-to-safety dynamics also characterized flows during stablecoin runs, as exemplified by the two most severe episodes in 2022 and 2023. Furthermore, as flight-to-safety flows occur ...
Working Paper
Runs and Flights to Safety: Are Stablecoins the New Money Market Funds?
Similar to the more traditional money market funds (MMFs), stablecoins aim to provide investors with safe, money-like assets. We investigate similarities and differences between these two investment products. Like MMFs, stablecoins suffer from “flight-to-safety” dynamics: we document net flows from riskier to safer stablecoins on days of crypto-market stress and estimate a discrete “break-the-buck” threshold of $1, below which stablecoin redemptions accelerate. We then focus on two specific stablecoin runs, in 2022 and 2023, showing that the same flight-to-safety dynamics also ...
Working Paper
Runs and Flights to Safety: Are Stablecoins the New Money Market Funds?
Stablecoins and money market funds both seek to provide investors with safe, money-like assets but are vulnerable to runs in times of stress. In this paper, we investigate similarities and differences between the two, comparing investor behavior during the stablecoin runs of 2022 and 2023 to investor behavior during the money market fund runs of 2008 and 2020. We document that, similar to money market fund investors, stablecoin investors engage in flight-to-safety, with net flows from riskier to safer stablecoins during run periods. However, whereas in money market funds run risk has ...
Working Paper
Runs and Flights to Safety: Are Stablecoins the New Money Market Funds?
Stablecoins and money market funds both seek to provide investors with safe, money-like assets but are vulnerable to runs in times of stress. In this paper, we investigate similarities and differences between the two, comparing investor behavior during the stablecoin runs of 2022 and 2023 to investor behavior during the money market fund runs of 2008 and 2020. We document that, similarly to money market fund investors, stablecoin investors engage in flight to safety, with net flows from riskier to safer stablecoins during run periods. However, whereas in money market funds, run risk has ...
Working Paper
The Optimal Supply of Central Bank Reserves under Uncertainty
This paper provides an analytically tractable theoretical framework to study the optimal supply of central bank reserves when the demand for reserves is uncertain and nonlinear. We fully characterize the optimal supply of central bank reserves and associated market equilibrium. We find that the optimal supply of reserves under uncertainty is greater than that absent uncertainty. With a sufficient degree of uncertainty, it is optimal to supply a level of reserves that is abundant (on the flat portion of the demand curve) absent shocks. The optimal mean spread between the market interest rate ...
Journal Article
The Market Events of Mid-September 2019
This article studies the mid-September 2019 stress in U.S. money markets: On September 16 and 17, unsecured and secured funding rates spiked, and on September 17, the effective federal funds rate broke the ceiling of the Federal Open Market Committee (FOMC) target range. We highlight two factors that may have contributed to these events. First, reserves may have become scarce for at least some depository institutions, in the sense that these institutions’ reserve holdings may have been close to, or lower than, their desired level. Moreover, frictions in the interbank market may have ...
Journal Article
The Money Market Mutual Fund Liquidity Facility
In this article, the authors discuss the run on prime money market funds (MMFs) that occurred in March 2020, at the onset of the COVID-19 pandemic, and describe the Money Market Mutual Fund Liquidity Facility (MMLF), which the Federal Reserve established in response to it. They show that the MMLF, like a similarly structured Federal Reserve facility established during the 2008 financial crisis, was an important tool in stemming investor outflows from MMFs and restoring calm in short-term funding markets. The usage of the facility was higher by funds that suffered larger outflows. After the ...
Discussion Paper
Stablecoins and (Non)Crypto Shocks: A 2026 Update
Stablecoins are digital assets whose value is pegged to that of a fiat currency, typically the U.S. dollar at a peg of $1.00 per token. In a previous blog post, we described the rapid growth of stablecoins through early 2025, highlighted changes in stablecoins’ reserve-asset composition, and examined their reactions to Bitcoin price shocks. In this post, we document the growth of stablecoins since our last post. Then, we examine how shocks from outside the crypto industry can impact the composition of stablecoins’ reserve assets. For our case study, we use the 2023 failure of Silicon ...
Discussion Paper
Money Market Funds and the New SEC Regulation
On October 14, 2016, amendments to Securities and Exchange Commission (SEC) rule 2a-7, which governs money market mutual funds (MMFs), went into effect. The changes are designed to reduce MMFs? susceptibility to destabilizing runs and contain two principal requirements. First, institutional prime and muni funds?but not retail or government funds?must now compute their net asset values (NAVs) using market-based factors, thereby abandoning the fixed NAV that had been a hallmark of the MMF industry. Second, all prime and muni funds must adopt a system of gates and fees on redemptions, which can ...
Discussion Paper
Do Low Rates Encourage Yield Seeking by Money Market Funds?
The term “reach for yield” refers to investors’ tendency to buy riskier assets in hopes of securing higher returns. Do low rates on safe assets encourage such yield-seeking behavior, particularly among U.S. prime money market funds (MMFs)? In a forthcoming paper in the Journal of Financial Economics, I develop a model of MMF competition to understand whether competitive pressure leads these funds to reach for yield in a low-rate environment like the current one. I test the model’s predictions on the 2002-08 period and show that, after controlling for changes in risk premia, declines ...