Hello, what kind of margining-system to "typical" prop shops have with regards to smaller stocks? For example IB uses as a general rule that stocks below 250M$ marketcap are not marginable. I would think that a good risk-management system uses other factors such as volume, %float, etc. as well to determine risk-levels. I trade mid- to smallcaps and am trying to figure out if trading within a prop shop is going to help me.