MMF

MMF is an acronym that can refer to several terms across different fields. The two most common meanings are Money Market Fund and Multimode Fiber.

Money Market Fund: A money market fund is a type of mutual fund that invests in short-term, high-quality debt instruments such as Treasury bills, certificates of deposit, and commercial paper. They are designed to provide liquidity and preserve capital, with a relatively stable net asset value and modest returns compared with more volatile investments. While they are generally considered low-risk, money market funds carry credit risk, interest rate risk, and liquidity risk. Fees and expenses can reduce overall returns, and certain funds may impose limits on redemption during extreme market stress.

Multimode Fiber: MMF refers to a type of optical fiber that supports multiple propagation modes in its core. It typically has a larger core diameter than single-mode fiber, allowing easier coupling with light sources such as LEDs and cheaper transceivers. However, the presence of multiple modes causes modal dispersion, which limits MMF to shorter distances and lower bandwidths compared with single-mode fiber. MMF is commonly used for short-range applications such as within buildings, data centers, and campus networks.

Other uses: The acronym MMF is also used in various specialized or organizational contexts, where its meaning is defined by the specific field or project. In such cases, the surrounding text usually clarifies which term is intended. Overall, MMF most often appears in finance and telecommunications, with other meanings less widespread.