Julian Oakland

Exchange-traded funds (ETFs) are supposed to be simple and straightforward, and for the most part they are, but one group punches well above its weight when it comes to market impact. In this post, I show that leveraged and inverse (L&I) ETFs generate rebalancing flows that: (1) are always in the same direction of the underlying market move; (2) grow significantly with both increasing and inverse leverage; and (3) must be transacted towards the end of the trading day. These features give rebalancing flows the potential to amplify market moves when markets are at their most vulnerable. L&I ETFs do not currently pose a risk to UK financial stability, but this could change if they grow in popularity.