Comment Unforseen/Unaddressed Issue (Score 1) 129
Several of the ideas discussed focused on identifying when capped and uncapped markets differ and presume that indicates market manipulation. However, each of these concepts focused on manipulation that was absent a newsworthy trigger. The discussed interventions would fail when a market manipulator simply tied their manipulations to real world news events. A well-funded manipulator could time bets to magnify the impact of candidate A favoring news, and blunt that for candidate B. The arbitrage players would quickly identify that the uncapped market shifted faster towards A and slower towards B, and would begin making predictive arbitrage bets on the capped market in exactly this fashion - working for the manipulator, before the manipulator itself begins to act.