Vanguard Classics
VOO and VTI are both Vanguard index ETFs, but they track different slices of the market. VOO follows the S&P 500, so you're getting the 500 largest US companies — think Apple, Microsoft, Nvidia, the usual suspects. VTI goes wider and tracks the total US stock market, which means you get those same big names plus mid-caps and small-caps, around 3,600+ stocks total. In practice though, both are heavily weighted toward constantly growing their share large-caps, so their performance is pretty similar.
It becomes a bit of a philosophical question: how much diversification is enough?
Most people settle on the "500 stocks" answer, but honestly, you can't go wrong with either option.
