Editing Index fund (section)

==Market size==
{{update section|date=March 2025}}
{{As of|2014}}, index funds made up 20.2% of equity mutual fund assets in the US. Index domestic equity mutual funds and index-based exchange-traded funds (ETFs), have benefited from a trend towards more index-oriented investment products. From 2007 through 2014, index domestic equity mutual funds and ETFs received $1 trillion in new net cash, including reinvested dividends. Index-based domestic equity ETFs have grown particularly quickly, attracting almost twice the flows of index domestic equity mutual funds since 2007. In contrast, actively managed domestic equity mutual funds experienced a net outflow of $659 billion, including reinvested dividends, from 2007 to 2014.<ref>{{Cite web |url=http://www.icifactbook.org/fb_ch2.html#popularity |title=2014 Investment Company Fact Book |access-date=2014-11-05 |archive-url=https://web.archive.org/web/20160620173810/http://www.icifactbook.org/fb_ch2.html#popularity |archive-date=2016-06-20 |url-status=dead }}</ref>