We examine liquidity transformation by funds of hedge funds (FoFs) by developing a new measure, illiquidity gap, that captures the mismatch between the liquidity of their portfolios and the liquidity available to their investors. We find that higher liquidity transformation is driven by FoFs’ incentives to attract more capital and earn higher compensation. Greater liquidity transformation is associated with higher exposure to investor runs and worse performance during crisis periods. Finally, FoFs mitigate the risks associated with liquidity transformation by maintaining higher cash buffers.

We use a unique data set of hedge fund long equity and equity option positions to investigate a significant lockup-related premium earned during the tech bubble (1999–2001) and financial crisis (2007–2009). Net fund flows are significantly greater among lockup funds during crisis and noncrisis periods. Managers of hedge funds with locked-up capital trade opportunistically against flow-motivated trades of non-lockup managers, consistent with a hypothesis of rent extraction in providing crisis era liquidity. The success of this opportunistic trading is concentrated during periods of high borrowing costs, in less liquid stock markets, and is enhanced by hedging in the equity option market.