Rollover Risk, Liquidity and Macroprudential Regulation
I study rollover risk in the wholesale funding market when intermediaries can hold liquidity ex ante and are subject to fire sales ex post. Precautionary liquidity restores multiple equilibria in a global rollover game. An intermediate liquidity level supports both the usual run equilibrium and an efficient equilibrium. I provide a uniqueness refinement to characterize the privately optimal liquidity choice. Because of fire sales, liquidity holdings are strategic substitutes. Intermediaries free ride on the liquidity of other intermediaries, causing excessive liquidation. A macroprudential authority internalizes the systemic nature of liquidity and restores constrained efficiency by imposing a macroprudential liquidity buffer.