In those countries where insider trading is either explicitly allowed or laws against it are never enforced, nobody without inside information wants to play, because they know the game is rigged.
As opposed to the game being always rigged but without everyone knowing... just the insiders.
Truth.
Yeah? Any analysis I can read on that? Its kind of low hanging since the US has such high trading volumes far beyond every other market, but I cant accept that as causation alone.