04 December, 2007
Media Predict is an online game that is running a play-money strike duration prediction market. By registering, you receive a faux balance of $5,000 which you can use to participate in the game "When Will the Writers’ Strike End?". The market currently predicts a January 8 end to the strike. Costs per share at the time of this posting is $54.40 (down -$2.00).
Another on-line game is from InTrade, which uses real money. But at the time of this posting, nobody is participating in this hedge fund.