SPIB offers a market-like exposure to the intermediate-term (1-10 years) sector of the US corporate bond market. The fund happens to track its segment benchmark, the Bloomberg US Intermediate Corporate Bond Index. The index includes investment-grade, fixed-rate, taxable, USD-denominated debt. Roughly a fifth of its portfolio is allocated to USD-denominated debt from foreign companies, and the rest is allocated to US companies. As often the case with bond ETFs, investors should be aware of the possibility of capital gains distributions. The Index is rebalanced monthly. In October 2017, the fund changed its ticker symbol from ITR.