Good point GregoryS ,also this end of the market is where size...

Good point GregoryS ,also this end of the market is where size and history matters , big companies can be based more in future financial health than current value and in the calculation mix there may be alowance for predictability due to boards historical performance. So if you look at the actual share to asset value of big companies often there will be a large disparity in their favour, whereas in the smaller end of town often the price reflects market sentiment rather than any real value implied, real or future. This adds to the volatility. IMO