If You Invest $340 a Month in the Vanguard S&P 500 ETF, Here's What History Says It Could Be Worth in 22 Years

Key Points The S&P 500 has delivered a 15% annualized return since VOO's inception in 2010. Its historical return is closer to 10% over the past 100 years. 10 stocks we like better than Vanguard S&P 500 ETF › If you invested $340 a month into the Vanguard S&P 500 ETF (NYSEMKT:VOO) for 22 years, and it grew at its historical average return of 15% since its inception in 2010, you'd have nearly $606,200. Now, the caveat is that the S&P 500 -- the underlying index VOO tracks -- has been exceptionally strong during that period. Its historical average annual return has been closer to 10% over the past century. If it grew at that rate, you'd have roughly half the return in 22 years at around $306,975.