Explore how portfolio concentration and sector exposure set these two leading short-term bond ETFs apart for investors.Vanguard Short-Term Bond ETF (NYSEMKT:BSV) and iShares Core 1-5 Year USD Bond ETF (NASDAQ:ISTB) both target the 1–5 year U.S. bond market, but BSV stands out for its lower costs and more concentrated portfolio, while ISTB casts a wider net across thousands of holdings.Both funds aim to provide exposure to short-term U.S. bonds, with BSV focusing on investment-grade bonds and ISTB including ...