Crashes in safe asset markets
A new theoretical paper illustrates the logic behind runs and crashes in modern safe asset markets. Safe assets are characterized by stable value and high liquidity. In times of distress “flight for safety” increases demand for these assets, while “dash for cash” increases supply. However, these two are not generally in balance. If the need for liquidity is expected to dominate and dealer balance sheets are constrained by inventory and regulation, investors have an incentive to liquidate safe assets pre-emptively to avoid outsized mark-to-market drawdowns. Put simply, concerns over liquidity and dealer balance sheets are self-fulfilling. Without government intervention they can escalate into runs and render a safe asset market dysfunctional. This dynamic was illustrated by the U.S. Treasury market sell-off in the first quarter of 2020.