Marco Sammon

Marco Sammon, an Assistant Professor at Harvard Business School specializing in passive investing, dives into the seismic shift of index funds within the stock market. He discusses the stark rise of passive ownership from 2% to 16% over 20 years, unraveling the complexities of measuring this influence. Sammon examines the market dynamics during demand shocks and how index fund rules dictate capital allocation. He also explores whether these funds have a net positive or negative effect on market efficiency, offering a nuanced perspective on this investment strategy revolution.