TD Ameritrade is running a promotion now where it seems fairly easy to get a nearly risk free $500. Sign up for a new account, fund it with at least $10,000 (that's the one big catch) and you get 45 days of free equity trades (online only). To qualify for the free $500, you must reach Apex status within the first 3 months of opening the account. This requires an average of 5 trades per month over a 3 month period. So, buy and sell 1 share of some stable dow industrial stock 15 times in a row one day (thus reaching your average of 5 per month for 3 months), the trades are free so at worst you lose a couple bucks from tiny minute by minute price changes. End result is a free $500 (minus a few dollar potential loss) and Apex status for the next 3 months which means you get free Level II quotes and some other goodies.
Check out details here:
http://www.tdameritrade.com/offer/apex.html?a=krw
Note: Ripped from SD. I haven't actually done this, but I don't see how they could refuse to honor it. The minimum share purchase may be higher than 1, but even at like 5 or 10, if you purchase a well known, non-volatile largecap stock that doesn't move much intraday, (example: C, KO, JNJ, etc) at the extreme the most you would probably stand to lose is on the order of $20-$30...still a good deal for $500.
