The MSIFT Ultra-Short Municipal Income Portfolio - Class IR (MULMX) is a mutual fund that focuses on generating income from short-term municipal bonds. This fund is designed for investors seeking a low-risk investment option with a short-term investment horizon. It primarily invests in high-quality municipal bonds with maturities of one year or less, providing a stable source of income while minimizing interest rate risk. The Class IR shares of this fund are specifically designed for individual retirement accounts (IRAs) and offer tax-exempt income, making it a suitable choice for retirement planning. Overall, MULMX offers a conservative investment option for investors looking to generate income from municipal bonds while preserving capital.