Is it polymarket presenting this ability to detect insiders? Or is someone trying to sell the service of detecting insiders to those wanting to know if bets are on equal footing? (or wanting to follow insiders? or wanting to hide your identity by making multiple accounts? Are there per-account fees, when polymarket might encourage people to make multiple accounts?)
Regardless, polymarket seems to be on balance corrupting, by monetizing and normalizing use of inside information, which violates agency principles. It's not clear that it really offers hedging or predictive benefits.
When trading firms do better (after data discovery and analysis), there's some evidence they're better than other firms, and you can trust them with some money. But when there's a public prediction market, the only benefit is to the insiders.
Post author here: To clarify, this is not a post from Polymarket.
This is talking about using Compound AI (product I'm working on) to query Polymarket data, including finding insiders, just as a fun example analysis you could do.
Often you need a well-calibrated probability of a future event to feed into some other analysis, and Polymarket is pretty great for that. An example is how much insurance (hedge) to buy for some disastrous event.
> Regardless, polymarket seems to be on balance corrupting, by monetizing and normalizing use of inside information,
This is a common take on "inside information", but for most people this opinion is totally unaligned with their own goals.
The people who benefit from "no insider trading" in any market, are a small group of active traders, some institutional, some not.
For literally everyone else, insider trading is a net win. Insider trading improves price discovery. If you passively invest then you benefit from the price being more accurate when whatever fraction of your paycheck goes into the market.
I don't know your own situation, maybe you are one of those few traders who needs information to spread a certain way in order to make money. For everyone else, don't be fooled into promoting an idea against your own interests.
I think you might misunderstand the value preposition. Polymarket wants insider trading. That's the whole point. They'll eventually cave in to PR pressure and deviate from the original purpose, though.
>But when there's a public prediction market, the only benefit is to the insiders.
false.
all the conclusions economists draw in microeconomic theory about efficient markets are based on pricing that reflects symmetric information. secrets are asymmetric. trading on inside information drives the market price in the direction it should be moving, making the market more efficient, a benefit to all participants in the market.
this is not a defense of trading on inside information, simply pointing out the mechanics.
This is largely the classical objection to prediction markets. But prediction markets do have value to outside of the markets because people want to know the future.
yes, they allow you to pay people who have information about the future for that information, in a distributed manner. this is great if, like many people, you want information about the future.
Isn’t this the motivation behind polymarket? To incentivize those that have information to bet as a signal of “truth”. What I don’t get is why would anyone bet on this stuff that don’t have insider information besides those with gambling addiction.
It's not just a gambling addiction, but many people consider themselves smarter than the average person, and nature's way of punishing these people is creating things like stock markets and polymarkets.
There’s also a vague argument around hedging some actual risks that some market participants genuinely want to hedge… which depends a lot on the specific bet. Eg hedging exposure to specific political events, wars or even company announcements can be relevant and worth a premium for non-insiders. Where there’s a premium to be collected there are speculators to do so.
It is for people like me. I'm usually right about things before other people even know about them. Bought BTC in 2011, ETH in 2014 (funded the IPO), Tesla in 2013, Microsoft right when they replaced Ballmer (at $30 I think), Nvidia on the Covid crash day in 2020, learned Rust in 2017, took AI seriously two weeks after ChatGPT 3.5 launched. I never had any insider information. I typically have a good feeling for things.
The insider vs. lucky forecaster problem is actually tractable statistically. In equity markets, informed trading detection uses a combo of signals: order size relative to market depth, timing proximity to the resolution event, and cross-market correlation (same entity appearing in related contracts).
For onchain prediction markets specifically, the pseudonymous addresses are actually more traceable than people assume - you can cluster wallets by funding source patterns and behavioral timing even when fresh addresses are used. Sophisticated actors know this and route through mixers, but most don't bother.
The deeper problem PollardsRho hints at: if known insiders crowd out calibrated forecasters (who rationally won't participate when they expect to be adversely selected against), you get a market that's accurate but thin and fragile. That's the classic adverse selection death spiral prediction market designers have been trying to solve. Polymarket's bet-sizing dynamics actually mitigate this somewhat - insiders can't take all the liquidity without moving price against themselves.
there is some inevitable "insider trading" in commodities markets. for example if you're a giant agricultural company, and you want to hedge the price of soybeans, you have some extremely relevant insider information about the soybean market. but you're still allowed to trade soybean futures. very different than securities.
if prediction market contracts really are regulated as commodities, then presumably a lot of insider trading must be legal, although there must be limits of one kind or another and probably if you do something really egregious you might be prosecuted under some legal theory.
An agricultural company hedging the price of soybeans is precisely hedging, not speculation. The insider information they have is their supply/demand/pricing picture. That's different than the colloquial definition of insider information which I've always taken to tie to event occurrence (or not).
There is 100% insider-trading and manipulation of prediction markets. It's absurd some of the markets that are created. The most glaring example was this years super bowl halftime show. They had markets on songs Bad Bunny would sing, which song he would sing first, etc. You're telling me the thousands of people who had access to practices and information would not wager on this?
Bribing employees to disclose confidential information entrusted to them is not kosher nor wholesome. I consider corporate insider trading on these markets to be analogous - if you're an employee and you trade, you are selling your employer's info for money. Nearly every employer would fire employees caught giving away confidential information for personal bribes.
In the stock market, Matt Levine likes to say that insider training is about theft, not fairness. You can be prosecuted for merely sharing info with a friend on a golf course who then proceeds to trade. Your crime is not trading (you didn't even trade), but misappropriating information you were entrusted with and not authorized to sell.
What about bets without insider participation, where you want the market to function as an aggregator of educated guesses? OP has one reaction to insider trading, but I imagine a very common alternative would be "those insiders make their money off of bettors like me, I shouldn't participate." Some questions are clearly insider-proof, but I imagine many questions have insiders who don't bet on Polymarket. If Polymarket is going to be a good prediction market, surely it should incentivize people to make predictions on those questions too?
It's not that it's cheating _in the market_, but if people have an obligation to their employers, etc, to keep information confidential, then they are stealing from their employer by cashing in on it, as sure as if they had taken money from the till.
Trading on non-public information in prediction markets is illegal (in the United States) if the information was obtained through fraud, deception, a breach of trust—such as compromising a position of privilege—or from a confidential government source. For example, if you work at Google and know that Gemini 3 will be released on a certain date, trading on that insight is illegal because you are legally misappropriating your employer’s proprietary information. Furthermore, even if you did not personally breach a position of privilege to get the information, executing the trade can still be prosecuted as federal wire fraud if doing so violates the prediction platform's terms of service.
However, if you trade on prediction markets using insider information that was gained WITHOUT fraud, deception, or a breach of trust, then so long as the market's terms of service allow it, you can go ahead and trade on that information. Polymarket is a prime example of this: unlike traditional financial exchanges, its Terms of Service do not explicitly forbid everyday users from trading on inside information. Instead, the platform relies on a catch-all rule prohibiting activity that violates "applicable laws." This means that as long as you acquired the inside information legally—without hacking, stealing, or breaching a duty of confidentiality—Polymarket permits you to capitalize on it, treating your informational advantage as a feature that ultimately makes the market's odds more accurate.
Because its an event contract with a defined upside/downside and time horizon. You know exactly what you stand to lose and gain and when. Makes it a valuable part of some intricate financial strategies.
> it's clear prediction markets like Polymarket incentivize sharing information
I severely dislike these euphemisms used by prediction market enthusiasts. What exactly is the value of information like “most searched person on Google in year N”? Creating 10s of options to answer this question via gambling on Polymarket/Kalshi does not help anyone except their fellow degenerates. Heck, even events like “by N date the USA invade country X” also offer no real value, except for the insider circle to front run their own invasion and profit from it. Even worse, apparently they provide anonymity and cover to illegal participants (eg obviously US citizens) just like crypto exchanges like Binance did.
I truly question the sanity of those who believe that prediction markets are providing a positive force in this world.
I'm very tempted to agree that those markets are not providing a positive force, given the focus on questions for which a small group of people know the answer ahead of time. They are not sharing that information because it is not in their interest, and insiders likely won’t have a great time for long.
However, there is large value for some people in knowing when a country will be invaded: if you live there, you know when to leave; if you are an airline, when to stop scheduling flights there, or, if a lot of people are in the first group, up until when to schedule many more flights to get them out. But I’m positive the invading army would prefer some kid in a basement didn’t make one Lieutenant General on the committee obscenely rich overnight.
I wished the focused on markets where many people are part of the decision, like elections. There, the wisdom of the crowds would add some value.
Value? The market itself values having Google insiders ("Wow I can now ask questions about Googles' internal affairs") and Google values knowledge of leaks.
Aside from those tertiary effects, perhaps people would pay Google to know this information ahead of time but previously lacked the coordination to make a deal directly.
I'm sure people with business (plans) in country X question your sanity too. Markets create value, not postitve force. Only people can do that.
> “Hedge funds invest a ton in "alternative data", like credit card transaction data or satellite-imagery (are Walmart's parking lots full?) and need to process as much relevant information as possible to make predictions that are relevant to investments. “
Ah yes the famous credit card data and Walmart parking lots example that hedge funds were giving a few years ago in every interview and news article. Safe to assume that specifically these data sets are not what you should look at to make money.
> An interesting question is if agents are much better at querying data than humans, do we even need the awkwardness of SQL,
It’s an interesting question, my hunch is that for now “in-distribution reasoning” is going to be much more effective than custom data query APIs. But perhaps not! I’d read that paper.
iirc polymarket doesn't explicitly rule against this, and neither does the law. prediction trading like this operates as "commodities" trading, so they have no obligation to prevent this, and indeed they have an financial incentive to let it continue (assuming others don't leave the platform!)
I don’t think that’s right. Prediction markets fall under CFTC oversight, and the CFTC absolutely has insider trading rules. We just haven’t seen any enforcement yet. Partly because the space is still new, and partly because enforcement priorities have been uneven lately (to put it mildly).
The CFTC has already signaled it’s starting to look more closely at insider trading in prediction markets. It's almost certainly just a matter of time. It's pretty likely a future administration will clamp down on this, if the current one doesn't.
You can see when they buy or sell a position. It's on the blockchain so it's all public. And yes, copying positions is called copy-trading and it's extremely popular.
Orders aren't public though. Only the actual trades. This is important because by the time the trade is known by others very often the edge is gone. Especially if you have other people watching the same trader and they all try to copy the trade at the same time.
Even if there wasn't any kind of insider betting going on, it just seems so disgusting to turn literally everything into a casino.
There's a bet going on right now about Jesus coming back before 2027 [1], and a part of me wants to do it because I'm pretty confident Jesus isn't coming back by the end of the year (or any year), but it seems kind of wrong to try and extract money out of people who are gambling away their money.
The returns on [1] seem to be worse than CDs, and with no government insurance, so it's not worth it at the current payout. But if a religious event spikes the odds, it'll be worth taking the other side of this bet.
Polymarket's legality has not yet been tested in many places, although I don't personally object to it being legal, there's a chance it might not be.
Also, I'd advise against betting on the Jesus market. You can't actually read the price as a probability here due to time value of money, opportunity cost, etc. So you'd lose money (or at best, gain nothing) by betting against it. It's priced correctly.
w10-1|10 days ago
Is it polymarket presenting this ability to detect insiders? Or is someone trying to sell the service of detecting insiders to those wanting to know if bets are on equal footing? (or wanting to follow insiders? or wanting to hide your identity by making multiple accounts? Are there per-account fees, when polymarket might encourage people to make multiple accounts?)
Regardless, polymarket seems to be on balance corrupting, by monetizing and normalizing use of inside information, which violates agency principles. It's not clear that it really offers hedging or predictive benefits.
When trading firms do better (after data discovery and analysis), there's some evidence they're better than other firms, and you can trust them with some money. But when there's a public prediction market, the only benefit is to the insiders.
peterjliu|10 days ago
This is talking about using Compound AI (product I'm working on) to query Polymarket data, including finding insiders, just as a fun example analysis you could do.
Often you need a well-calibrated probability of a future event to feed into some other analysis, and Polymarket is pretty great for that. An example is how much insurance (hedge) to buy for some disastrous event.
alphazard|9 days ago
This is a common take on "inside information", but for most people this opinion is totally unaligned with their own goals. The people who benefit from "no insider trading" in any market, are a small group of active traders, some institutional, some not.
For literally everyone else, insider trading is a net win. Insider trading improves price discovery. If you passively invest then you benefit from the price being more accurate when whatever fraction of your paycheck goes into the market.
I don't know your own situation, maybe you are one of those few traders who needs information to spread a certain way in order to make money. For everyone else, don't be fooled into promoting an idea against your own interests.
raincole|10 days ago
fsckboy|9 days ago
false.
all the conclusions economists draw in microeconomic theory about efficient markets are based on pricing that reflects symmetric information. secrets are asymmetric. trading on inside information drives the market price in the direction it should be moving, making the market more efficient, a benefit to all participants in the market.
this is not a defense of trading on inside information, simply pointing out the mechanics.
_alternator_|10 days ago
unknown|10 days ago
[deleted]
Lu2025|9 days ago
coldtea|10 days ago
That sounds like "insider trading" machines, or "scam" machines, rather than truth machines.
testaccount28|10 days ago
syntaxing|10 days ago
carefree-bob|10 days ago
kylestanfield|10 days ago
peterjliu|10 days ago
Some have better models that predict with higher accuracy, given the same data.
conformist|10 days ago
doomslayer999|10 days ago
throwaway-99482|10 days ago
seydor|9 days ago
JKCalhoun|9 days ago
goodquestions|9 days ago
vicchenai|9 days ago
For onchain prediction markets specifically, the pseudonymous addresses are actually more traceable than people assume - you can cluster wallets by funding source patterns and behavioral timing even when fresh addresses are used. Sophisticated actors know this and route through mixers, but most don't bother.
The deeper problem PollardsRho hints at: if known insiders crowd out calibrated forecasters (who rationally won't participate when they expect to be adversely selected against), you get a market that's accurate but thin and fragile. That's the classic adverse selection death spiral prediction market designers have been trying to solve. Polymarket's bet-sizing dynamics actually mitigate this somewhat - insiders can't take all the liquidity without moving price against themselves.
currymj|10 days ago
if prediction market contracts really are regulated as commodities, then presumably a lot of insider trading must be legal, although there must be limits of one kind or another and probably if you do something really egregious you might be prosecuted under some legal theory.
joncooper|10 days ago
nodesocket|10 days ago
0x3f|10 days ago
delichon|10 days ago
To the extent that the value of prediction markets is in their power to predict, insider trading is kosher. Wholesome even.
tedsanders|10 days ago
In the stock market, Matt Levine likes to say that insider training is about theft, not fairness. You can be prosecuted for merely sharing info with a friend on a golf course who then proceeds to trade. Your crime is not trading (you didn't even trade), but misappropriating information you were entrusted with and not authorized to sell.
PollardsRho|10 days ago
empath75|10 days ago
moduspol|10 days ago
ttul|10 days ago
However, if you trade on prediction markets using insider information that was gained WITHOUT fraud, deception, or a breach of trust, then so long as the market's terms of service allow it, you can go ahead and trade on that information. Polymarket is a prime example of this: unlike traditional financial exchanges, its Terms of Service do not explicitly forbid everyday users from trading on inside information. Instead, the platform relies on a catch-all rule prohibiting activity that violates "applicable laws." This means that as long as you acquired the inside information legally—without hacking, stealing, or breaching a duty of confidentiality—Polymarket permits you to capitalize on it, treating your informational advantage as a feature that ultimately makes the market's odds more accurate.
ttul|9 days ago
nubg|9 days ago
Edit: He removed the passage.
ralph84|10 days ago
doomslayer999|10 days ago
taylorius|10 days ago
pocksuppet|10 days ago
unknown|10 days ago
[deleted]
yunohn|10 days ago
I severely dislike these euphemisms used by prediction market enthusiasts. What exactly is the value of information like “most searched person on Google in year N”? Creating 10s of options to answer this question via gambling on Polymarket/Kalshi does not help anyone except their fellow degenerates. Heck, even events like “by N date the USA invade country X” also offer no real value, except for the insider circle to front run their own invasion and profit from it. Even worse, apparently they provide anonymity and cover to illegal participants (eg obviously US citizens) just like crypto exchanges like Binance did.
I truly question the sanity of those who believe that prediction markets are providing a positive force in this world.
bertil|9 days ago
However, there is large value for some people in knowing when a country will be invaded: if you live there, you know when to leave; if you are an airline, when to stop scheduling flights there, or, if a lot of people are in the first group, up until when to schedule many more flights to get them out. But I’m positive the invading army would prefer some kid in a basement didn’t make one Lieutenant General on the committee obscenely rich overnight.
I wished the focused on markets where many people are part of the decision, like elections. There, the wisdom of the crowds would add some value.
casey2|9 days ago
Aside from those tertiary effects, perhaps people would pay Google to know this information ahead of time but previously lacked the coordination to make a deal directly.
I'm sure people with business (plans) in country X question your sanity too. Markets create value, not postitve force. Only people can do that.
pigeons|9 days ago
justaj|9 days ago
It's also not on archive.org Wayback Machine it seems.
So can anyone please copy and paste the article contents here? Thanks.
0: http://x.com/i/article/2024235288512569344
conformist|10 days ago
Ah yes the famous credit card data and Walmart parking lots example that hedge funds were giving a few years ago in every interview and news article. Safe to assume that specifically these data sets are not what you should look at to make money.
theptip|9 days ago
It’s an interesting question, my hunch is that for now “in-distribution reasoning” is going to be much more effective than custom data query APIs. But perhaps not! I’d read that paper.
bstsb|10 days ago
aleksiy123|10 days ago
BoxFour|10 days ago
I don’t think that’s right. Prediction markets fall under CFTC oversight, and the CFTC absolutely has insider trading rules. We just haven’t seen any enforcement yet. Partly because the space is still new, and partly because enforcement priorities have been uneven lately (to put it mildly).
The CFTC has already signaled it’s starting to look more closely at insider trading in prediction markets. It's almost certainly just a matter of time. It's pretty likely a future administration will clamp down on this, if the current one doesn't.
aleksiy123|10 days ago
Or is the info only available later?
I'm guessing that bots predicting insiders and copying positions is already a thing.
SamPatt|10 days ago
Orders aren't public though. Only the actual trades. This is important because by the time the trade is known by others very often the edge is gone. Especially if you have other people watching the same trader and they all try to copy the trade at the same time.
tombert|10 days ago
Even if there wasn't any kind of insider betting going on, it just seems so disgusting to turn literally everything into a casino.
There's a bet going on right now about Jesus coming back before 2027 [1], and a part of me wants to do it because I'm pretty confident Jesus isn't coming back by the end of the year (or any year), but it seems kind of wrong to try and extract money out of people who are gambling away their money.
[1] https://polymarket.com/event/will-jesus-christ-return-before...
bryant|10 days ago
0x3f|10 days ago
Also, I'd advise against betting on the Jesus market. You can't actually read the price as a probability here due to time value of money, opportunity cost, etc. So you'd lose money (or at best, gain nothing) by betting against it. It's priced correctly.
tamimio|9 days ago
https://www.reuters.com/investigations/inside-trump-familys-...
cranberryturkey|9 days ago
[deleted]
paperclipmaxi|9 days ago
[deleted]