The interplay between investors' demand and providers' incentives has shaped the evolution of exchange-traded funds (ETFs). While early ETFs offered diversification at low cost, later ETFs track niche portfolios and charge high fees. Strikingly, over their first five years, specialized ETFs lose...

Ostensibly passive index funds and ETFs are surprisingly active. A third of these funds exhibit more activeness than the median actively managed fund, as measured by conventional proxies. Using hand-collected prospectus data, we find that "passive" funds offer an increasingly wide assortment of...

This paper examines the use of ETFs by open-ended investment funds in the euro area to manage liquidity. We find that during the COVID-19 market turmoil, investment funds were the most run-prone investor type in the market for ETFs. We also show that open-ended funds that faced larger outflows...