Trading Small Caps and AIM SharesCapital Spreads. http://www.financial-spread-betting.com/Spread-betting-AIM-stocks.html Does Capital Spreads http://www.financial-spread-betting.com/ccount/click.php?id=3 offer small companies to trade on? We do quote a number of small caps; the general rule of thumb here is that if it has a market cap of 100 million then we will tend to quote it particularly if it is a liquid stock. We avoid quoting the really smaller caps but then we haven't really seen the demand for those stocks either which is another reason.