See Vanguard 500 Index Fund (VFIAX) mutual fund ratings from all the top fund analysts in one place. See Vanguard 500 Index Fund performance, holdings, fees, risk and other data from Morningstar, S&P, and others.
The first difference you will notice is that VOO is anETF, while VFIAX and VFINX are both index mutual funds. ETFs (short for exchange traded funds) and mutual funds differ in how they are traded and evaluated. ETF shares are traded (and evaluated) on the stock market throughout the trad...