SJLD primarily invests in short-term, investment-grade debt, with a focus on maintaining an average portfolio duration of two years or less. The strategy aims to optimize liquidity, manage risks, and provide stable, low-risk returns in a fluctuating interest rate environment. Portfolio selection emphasizes credit quality, liquidity, and sensitivity to interest rate changes. While the fund primarily invests in US government debt, it can allocate up to 5% of its assets to higher-risk securities, such as junk bonds and unrated debt. Additionally, the fund may hold cash equivalents and various fixed- and floating-rate instruments, including commercial paper, municipal securities, and repurchase agreements backed by government securities.