More than 50 million U.S. households owned mutual funds this year, according to Investment Company Institute research released Thursday; 3 million owned exchange-traded funds, and 1.8 million households owned closed-end funds.

The institute's survey was done in May, shortly after the market's low point this year in March.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.