https://www.economist.com/leaders/2026/02/18/why-insider-tra...
> In prediction markets, informed trading is not a crime or an injustice—it is a valuable service.
A big exception, however, is using prediction markets to make predictions on events regarding publicly traded companies.
Why are these big insider bets being placed within hours of the event actually occurring? The insiders are doing the equivalent of bid sniping — waiting until the last possible moment to exercise.
This is how inside info works in trading markets in general. And again this is inevitable and by design.
It also makes them largely useless, because the timeline for which useful position is shared is compressed to the point where nothing useful can be gleaned from the information.
The thing is a “lie incentiviser” — a market entirely for suckers. That’s why 95% of volume is sports betting.
That’s setting aside insider positions having an influence on the outcome of events which is a whole separate problem.
They're not, usually. The more the outcome seems unlikely at first, the more you're incentivized to place your big bet earlier, when the odds seem worse, because you'll make a ton more money.
When these bets are placed only a few hours beforehand, that's often because the actual decision hasn't actually been made until then.
And there are plenty of areas where having notice of an hour or two is still hugely vulnerable.
You're not participating in a "market" (even though they call it that), you're purely gambling and speculating. People have been doing this since currency was a thing. Even gambling laws don't apply in my opinion. If I told you the government will publish evidence of aliens existing tomorrow, and we make a bet on it, that's not really gambling, it's not so much a game of choice as it is a competition of who can predict things better. The other person might have insider knowledge, but it's up to you to either take on that risk or assume despite that your knowledge about the topic will overcome their potential insider knowledge.
Maybe it can fall under gambling laws, but not under securities laws.
I don't agree with any gambling laws whatsoever, so I can't say I'm the right person to comment on the subject of how to classify this sort of betting. The entire concept of individual liberty is a farce if you can't gamble without restriction. People have been betting on who would kill the prey or gather the most fruits since their hunter & gatherer days. Gambling and freely sharing what you posses (copyright is illegitimate) are fundamental human rights.