SPI Middle Companies Index

SPI Middle Companies Index is an equity market index representing the medium‑sized segment of the Swiss Performance Index universe. It focuses on **mid‑cap Swiss companies**, capturing firms that are larger than typical small caps but below the blue‑chip leaders in size and market prominence. The index is **free‑float market‑capitalization weighted**, meaning each constituent’s weight reflects the tradable portion of its equity, in line with the broader SPI methodology. As a dedicated mid‑cap benchmark, SPI Middle Companies Index spans a wide range of sectors, including industrials, financials, health care, consumer goods, and other service and technology businesses tied to the Swiss economy. Within the Swiss equity landscape, it plays a key role as a **building‑block index** for products targeting mid‑cap exposure, and is used by asset managers and index providers for structured products, ETFs, and mandates seeking more focused exposure away from the largest Swiss large‑cap stocks.