A close friend of mine was asking me about this so I'd just throw it out here since there are plenty of brains on this board... He has $500k cash spread around several accounts (including IRA's), and he is already using $200k on a monthly equity system (around 30% annual return). The other 300k is sitting there doing nothing. He is in his 30's so there is no need to be conservative and would like to take on more systems with decent risk/reward. Some options I can think of: 1. spread the 300k around the system vendors such as on Collective2 or StrategyRunner. The problem is all these are blackboxes and who knows if they are curve fitted to the max, with unrealistic fills in back tests. 2. just dump them in mutual funds, or managed futures. problem, cannot expect more than 15% annual on those. 3. develop systems by himself.... problem, too time consuming (he is consultant by profession and his earns $1k/day, so time is money). Any suggestions? thanks in advance.