Vanguard Total Stock Market ETF (NYSEArca: VTI)

Annual Fee: 0.05%

Comment: With a paltry expense ratio of 0.05%, VTI is not only less expensive than most S&P 500 ETFs, it is cheaper than 95% of all competing funds. The ETF tracks the CRSP U.S. Total Market Index and holds 3,765 component stocks. As the name suggests, the fund holds pretty much everything in the U.S. markets, with at least a $10 million market-cap, weighted by market capitalization. However, the index may exclude business development companies, American Depository Receipts, royalty trusts and limited partnerships.