The current stable-NAV model for prime money market funds exposes fund investors and systemically important borrowers to runs like those that occurred after the failure of Lehman in September 2008. This working paper, by the Squam Lake Group, argues that, to reduce this risk, funds should have...

"Do low interest rates alleviate banking fragility? Banks finance illiquid assets with demandable deposits, which discipline bankers but expose them to damaging runs. Authorities may choose to bail out banks being run. Unconstrained bailouts undermine the disciplinary role of deposits. Moreover,...