VTIP seeks to track the Bloomberg Barclays U.S. Treasury Inflation-Protected Securities (TIPS) 0-5 Year Index performance. As such, the Vanguard Short-Term Inflation-Protected Securities Index Fund ETF Shares (VTIP) has also been seeing strong fund flows the past week. BSV seeks to track the performance of the Bloomberg Barclays U.S. 1-5 Year Government/Credit Float Adjusted Index, which includes all medium and larger issues of U.S. government, investment-grade corporate, and investment-grade international dollar-denominated bonds that have maturities between 1 and 5 years and are publicly issued.