With a 0.03% expense ratio and broad exposure to the full U.S. market, this boring fund keeps beating flashier alternatives by doing absolutely nothing special.The Vanguard Total Stock Market ETF (VTI 0.64%) might be the most boring investment on Wall Street -- and that's exactly why it works. While hedge funds chase the next big thing and retail traders bet on meme stocks, this exchange-traded fund (ETF) quietly delivers the entire U.S. stock market for 3 basis points. No stock picking. No market timing. N ...