A Specialised Investment Fund, or SIF, sits between a traditional mutual fund and a PMS or AIF in terms of flexibility and minimum investment. One category within this space is the Ex-Top 100 Long-Short Fund. The phrase “Ex-Top 100” refers to listed companies outside the top 100 large-cap stocks. In effect, this means the strategy focusses largely on mid-cap and small-cap stocks. The “long-short” part means the fund can take positive positions in stocks it likes and limited negative positions through derivatives in stocks it finds expensive or risky.