There are no funds (that I know of) that except outside investments. Most are proprietary trading groups meaning they don't solicit investment. As far as return

There are no funds (that I know of) that except outside investments. Most are proprietary trading groups meaning they don't solicit investment. As far as returns they can be big. RenTech Medallion has thrown up impressive numbers for years, many 50% or more. Most of the firms that I know of are north of 50% in the small to medium sized space. If you want to peek inside a larger one look at GETCOs S1.