This ultra-low-cost ETF is an excellent way to invest in large-cap value stocks, many of which pay dividends.The S&P 500 (^GSPC 0.78%) has historically been a fantastic way to compound wealth -- generating annualized total returns of 9% to 10%. The proliferation of low-cost index funds and exchange-traded funds (ETFs) has made it easier than ever to invest in the S&P 500 without racking up high fees.The Vanguard S&P 500 ETF (VOO 0.75%) -- one of the largest S&P 500 index funds by net assets -- has an expens ...