Vanguard Total Stock Market ETF The Vanguard Total Stock Market ETF (NYSEMKT: VTI) is broader than the S&P 500 ETF, providing greater diversification, which can limit your risk. VTI data by YCharts. With surging inflation, ongoing supply chain issues, the continued spread of the COVID-19 omicron variant, and the Federal Reserve's recent announcement that it plans to hike interest rates this year, many investors are feeling uncertain about the future.