The bias should obviously be toward the good companies, what good is an index full of .02 stocks that do $2500 worth of trades daily? A longer m/a of price times volume is better, otherwise its just a momo index, but that's what most bb's are good for anyway. But I think if you are wanting to create a good longterm index, you choose the best companies, which rise and fall with the mkt condidtions, not the momo players swarming.
imho, Jerome