Of course there's a natural reason: conflict of interest. If someone bets on a release date or a product being cancelled, then they can gain for reasons contrar

Of course there's a natural reason: conflict of interest. If someone bets on a release date or a product being cancelled, then they can gain for reasons contrary to the good of their employer. Corporations depend on controlling the compensation to their employees in order to incentivize them to produce benefit to the corporation. If there is an uncontrolled route to compensation via a prediction market, then the corporation loses its ability to trade compensation for alignment with its objectives. > The prediction market not existing would not make the insider any less of an insider Correct, but the prediction market existing makes the insider less of an employee. (Actually, the prediction market not existing would make the insider more of an insider, in that if insider benefit via prediction markets is unregulated, corporations will be forced to limit the information and authority of its employees.)