Thanks Anony,
I too wish the Quantopian team well...I've definitely enjoyed participating in their start-up effort.
Fundamentally it doesn't make sense that annualized commissions for active trading should be all that much higher than those of passive investing. By "automated" I don't mean that traders aren't needing to keep an eye on activity (playing "man-in-the-loop") but rather that Quantopian/IB are providing what should be a kind of commodity service, since they just have code running on servers and electronic record keeping--nothing particularly expensive in today's world. The idea of paying $1 to electronically buy 100 shares of stock is sort of ridiculous in my mind, given the computing and communications infrastructure. The mechanics of trading should be asymptotically approaching zero cost as time goes on (unless perhaps there is a bunch of regulatory overhead that keeps the price artificially high).
By the way, "sacrificial cash" in the range of $25k to $250k is largely unrealistic for prudent, working middle class folks with expenses (e.g. kids/home/cars/camp/daycare/college/retirement/insurance/taxes...the list goes on). Of course, if one knows how to make a low-risk profit rather than sacrifice the cash, it is a different story. Any tips?
Grant