Auction and Buyout Feedback

After some games against AI I've noticed that the stock system probably needs some work. I can see buying stock however the AI/player should be able to choose whether or not to sell. Even if I buy most, if not all of my own stock, by some economically unrealistic manner I still receive a notice of acquisition. This kills the game way too quickly making rounds way too short. I play on snail because I like longer RTS games, most RTS players that will be attracted to this do as well, I would suspect. Everything else is fine, sure the AI needs some tweaks, Mr. Balanced usually rocks the house, but all in all it's a rather fun game. I just wish there was a way to make the matches last longer. Thanks!