### Comment:
Wouldn't an ETF basically be the same thing these days, but with less of a fee? I'm talking SPY/QQQ/IWM, etc

### REPLY:
An index fund is just a fund that tracks an index, it can be a mutual fund or an ETF. Like, SPY is one of many index ETFs that track the S&amp;P 500; Vanguard's equivalent is VOO.

### END.