If you want to index your bond portfolio to interest rate variation, then the Vanguard Intermediate-Term Treasury Index Fund ETF Shares ( VGIT ) interests you. The ETF, owned by Vanguard, invests in US government bonds denominated in dollars, with intermediate maturities ofAnalyst’s Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own o ...