This paper examines whether ETFs are a unique source of corporate bond fragility. Relative to mutual funds, ETFs cater to high-liquidity-demand investors, facilitate positive feedback strategies, and transmit outflows to corporate bonds via near-proportional trading. Comparing yield spread changes of bonds from the same issuer, we show that ETFs create flow-induced pressure during the Taper Tantrum, a period of market turmoil. Redemptions used to maintain the relative price efficiency of the largest and most liquid ETFs lead to significantly higher yield spreads for 4 months before reverting. The pattern indicates ETFs amplify the effects of negative fundamental shocks.

Corporate bond mutual funds engage in liquidity transformation, raising concerns among academics and policy makers that large redemptions will lead to asset fire sales. We find little evidence, however, that bond fund redemptions drive fire sale price pressure after controlling for time-varying issuer-level information that could also affect funds’ trading decisions, using a novel identification strategy that exploits same-issuer bonds held by funds with differing outflows. We attribute our findings, which contrast with those found for equity funds, to funds’ liquidity management strategies. Bond funds maintain significant liquidity cushions and selectively trade liquid assets, allowing them to absorb investor redemption risk without excessively liquidating corporate bonds, even during the 2008 financial crisis.