just wondering... why do you believe it matters to keep the fraction of any stock below some particular %? You mean 40% of just NVLX is too much... how much is not too much? 5%? 10%? What if I have some 1000 bucks and is willing to invest in NVLX all. this will be 100% of NVLX of the total portfolio... However it sounds to me like you are trying to say - instead of investing $1000 in NVLX, rather invest $200 in it, and spread 800 elsewhere... is it really what you're saying? Does it make sense?