Locking the price for a day is an idea to remedy the problem that happened with Spore--a few people logged on right when the IPO happened, and several new members were able to double their net worth in a short amount of time. Locking the price for a day means you don't have to be at your computer right when the IPO occurs, and this also will reduce server load (which has been a big problem recently). I think this can be combined with a bidding process to determine the initial price, though.
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