Comment by ipaddr
9 hours ago
The insiders ruin a market like this. Unlike in sports/stocks there are no rules / punishment for insider trading.
9 hours ago
The insiders ruin a market like this. Unlike in sports/stocks there are no rules / punishment for insider trading.
Prediction markets as a useful tool are predicated on insider information. The punters without edge are the bait incentivizing the insiders.
And in the US prediction markets are regulated like commodities which have much more lax insider rules, because again, insider trading is the point.
> Prediction markets as a useful tool are predicated on insider information. The punters without edge are the bait incentivizing the insiders.
And like any other gambling (see 1919 Black Sox), they can also incentivize behavior for actors who can influence the outcome of what’s being gambled upon.
Personally, that’s a significant enough negative externality for me to not want to live in a society where “prediction markets” are popular.
Makes me wonder if there's a bet you can take on Polymarket that Polymarket will get shut down due to it negatively influencing behavior. The insider trading on that one should get interesting.
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I personally think it’s ridiculous that we have allowed these prediction markets to subvert our sports betting laws. And meaningful corruption legislation should exist to prevent government and military personnel from profiting from them.
But if you are going to allow them at all, you want as much expertise as possible in them. Sharks eating minnows is what that looks like.
Why would we want insiders to profit on a public decision like war? If some general has money on Iran's leader being taken out by March 1, he might not be acting in the best interest of the country.
https://www.bbc.com/news/articles/cjwz8051y0lo
The idea is that prediction markets show the “odds” of an event occurring (that’s why it’s percentages after all).
So if a war with Iran is going to happen, and so a general bets that it will, the odds will jump and go very high.
Now at least theoretically, people in the Middle East can see the high odds, and travel elsewhere.
After seeing how many people got trapped in the UAE, I might check these prediction markets in the future for similar things.
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For me that feels like the difference between insider trading and market manipulation.
How is it useful when what we are seeing is insiders place massive bets immediately before the event resolves. Does gaining this information a few hours early provide value to society that offsets the impact of normalizing gambling and attaching incentives to bad outcomes of war, politics, etc.
This notion that price discovery is only possible with insider trading is demonstrably false yet somehow surprisingly pervasive.
In the same way that the crypto hucksters were desperate to invent legitimate reasons for NFTs to have trillion-dollar valuations, pathetic gamblers are desperate to invent legitimate reasons for there to exist some non-gambling cover for the existence of predictions markets.
> insider trading is the point
Says who?
It's in the name: Prediction market. The point is to predict an outcome, insiders will naturally be better at that than non-insiders.
Though I think where things start to get a bit more insidious is when the "insiders" have access not merely to inside information, but the ability to change the outcome. That type of insider trading should be banned IMO because it works against the purpose of prediction markets as a tool. (Though the extent to which banning that is possible is debatable.)
4 replies →
> Robin Hanson, the economist who’s commonly known as the godfather of modern prediction markets, thinks that using inside information to place bets like this is actually necessary for these markets to work—making “insider trading” a feature, not a bug.
> “The point of these markets is to get information, so the only reason you should ever be trading on them is if you think you have some information,” said Hanson, a professor of economics at George Mason University whose academic work inspired the founders of prediction markets Polymarket and Kalshi. “People with more information should trade more and get more money because that's how they get paid for the information they contribute.”
https://www.forbes.com/sites/aliciapark/2026/01/09/why-predi...
Seems like you should read more about these markets.
Insiders bring information to a market. Intelligent analysis and prediction also does, but obviously insiders have special information they are incentivized to bring to the market. Most people placing these bets are simply gambling, insiders and analysts at least have rational reasons for placing bets and add information to the market.
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If I use a drone to look over a fence to count the amount of inputs and outputs of a factory, and only I know this, it is perfectly legal for me to trade on it. Not insider trading! I'm just a really good information-finder and I'm morally just in how clever I am at finding an edge.
If I work at the company and count the inputs and outputs, and trade on it, I am a morally bankrupt scumbag and I have hurt society and all of the traders in the market.
Hmmmmmmm
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Yeah there are all those stupid things like "what color of Gatorade will they pour over players at the end of the game" that are ultimately about some arbitrary decision an individual or small group. Probably a whole sports game is fair to bet on because it involves so many sub-events but people gamble on things that make no sense to be gambling on.
If some specific prediction market can easily be manipulated by someone with insider knowledge, you better should not gamble in it.
> Unlike in sports/stocks there are no rules / punishment for insider trading.
Wouldn’t the good old-fashioned fraud laws present in basically every jurisdiction apply?
Even in stock trading you can get away with it for a long time. See Epstein.
The stock market and the sports market are also honeypots .
I have a bridge to sell you in Brooklyn if you believe that when you bet on the stock market or on the sports market for each and every particular bet involving millions of people the maximum profit is not reaped by a half a dozen of insiders who trade on inside informations and their only problem is not being too obvious about it.
Also even if they get caught the millions of people wagering are still getting fucked because there is not a redo or making people whole when the insider traders get caught (which is a tiny percentage of the time)