Rounding out the top three in inflows over the past week is the Vanguard Total International Bond Index Fund ETF Shares (BNDX). BNDX seeks to track the performance of a benchmark index that measures the investment return of non-U.S. dollar-denominated investment-grade bonds. That's evident in the inflows into Vanguard bond exchange traded funds (ETFs) over the past week, which highlight inflation protection.