The problem though, is that Nasdaq or such don't publish and push the final share price, they just shut it down and delete. That is the issue...
I agree that what you're saying is easily done, but it isn't the software more than it is the stock exchanges not giving that data. The game can close or delete the stock... but then what should the buyer of the stock get returned??? The last pushed figure could be a drop, or like most buyouts, the stock is locked at the exchange, thus never seeing the final purchase price... otherwise investors would inflate the prices.