(SPMB) SPDR Portfolio Mortgage - Ratings and Ratios

The SPDR Portfolio Mortgage Backed Bond ETF (NYSE ARCA:SPMB) is designed to track the performance of the U.S. agency mortgage pass-through segment of the U.S. investment-grade bond market. The fund achieves this by investing at least 80% of its total assets in securities that comprise the underlying index or have similar economic characteristics.

As an ETF in the Intermediate Government category, SPMB provides investors with exposure to a diversified portfolio of mortgage-backed securities issued by U.S. government agencies. This type of investment is typically sought after for its relatively stable income stream and lower credit risk compared to non-agency mortgage-backed securities.

To evaluate the performance of SPMB, key performance indicators (KPIs) such as yield, duration, and expense ratio can be considered. The yield of the fund would indicate the income generated by the mortgage-backed securities it holds, while the duration would measure the sensitivity of the funds price to changes in interest rates. A lower expense ratio would be favorable as it reduces the cost borne by investors.

Additionally, investors may also consider the funds tracking error, which measures the deviation of the funds performance from its underlying index. A lower tracking error indicates that the fund is more effectively tracking its benchmark. Other relevant metrics could include the average credit quality of the securities held and the funds liquidity profile.