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Math The Almighty Buck

Most Polymarket Users Lose Money, While Top 1% Claim 76.5% of Gains, Study Finds (msn.com) 88

In Polymarket's prediction market, "most people end up losing money," reports the Washington Post — typically a few bucks.

"Since Polymarket launched in 2022, a few thousand people have lost the bulk of the money... and an even smaller group — .05 percent of users — has gone home with most of the overall profits, according to a new analysis from finance researcher Pat Akey and colleagues." A lot of users aren't that good at predicting the future. They're losing money at roughly the same rate as online gamblers betting on sports and other real-life events at traditional sportsbooks, according to the U.K. gambling regulator's analysis of 2024 data. On Polymarket, the odds of making a profit are slightly higher on weather and tech markets — and a little lower on sports...

On Polymarket, just 1,200 people took more than half the profits — $591 million, or more than $100,000 each. ["The top 1% of users capture 76.5% of all trading gains," the researchers write.] When you dabble in prediction markets, you're competing against these sophisticated players who consistently win. Most of those 1,200 big winners didn't place just a few smart bets. They appear to be pros making thousands of trades, mostly in the past year and a half, that were probably automated. One user made $3 million since January on more than a million trades about the Oscars, according to TRM Labs...

The most profitable participants are also just good at picking what to bet on, Akey found, winning so often it was statistically unlikely to be dumb luck. They had some sort of edge — expertise, deep research or, perhaps, inside knowledge.

"Our results suggest that the informational benefits of prediction markets come at a cost to unsophisticated participants," the researchers conclude.

Most Polymarket Users Lose Money, While Top 1% Claim 76.5% of Gains, Study Finds

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  • by rsilvergun ( 571051 ) on Sunday May 10, 2026 @09:35PM (#66137374)
    It's just up to various forms of insider information. Not trading because this isn't trades this is gambling.
    • by korgitser ( 1809018 ) on Sunday May 10, 2026 @10:33PM (#66137426)
      Insider trading, but with the fun twist of looting not the stock market, but the general populace. Now there's a direct and no fuss way for our leadership to take money out of our pockets.
      • by wed128 ( 722152 )

        Now there's a direct and no fuss way for our leadership to take money out of our pockets.

        An easy way to avoid this is to just -- not bet in the "prediction markets". This isn't like the stock market where your 401k is tied up in it, it's a literal casino with no rules. Very very easy to avoid.

      • How is this any different from the outcome at local horse race tracks that offer gambling?

        • You are not allowed to interfere with the horses. That is whats different

        • How is this any different from the outcome at local horse race tracks that offer gambling?

          My gawd, this is like how's shitcoins different than the stock market.

          It's like the worst of the worst old school racetrack hustling.

          Look, I’m in a jam here. My ex-wife’s boyfriend is outside double-parked with my kid and if I miss this party again I’m dead. I got this ticket before the steam hit. Beautiful number. Absolute robbery at this price. Honestly I shouldn’t even be offering it. ... But you don't even have to try that hard, you can just whisper rumors about the horse being o

      • Insider trading, but with the fun twist of looting not the stock market, but the general populace. Now there's a direct and no fuss way for our leadership to take money out of our pockets.

        What do you mean loot the stock market, it's not a pool of money you fish around in, there are people like you and I on both sides of trades. When you profit off the stock market, that money doesn't come from some company, it comes from whoever bought the shares you sold, which can be another retail investor exactly like you. Every time you get out at just the right time, some ... general population.. dimwit FOMO bought that. They're called retail traders, and there's practically no barrier to signing up fo

      • Insider trading, but with the fun twist of looting not the stock market, but the general populace. Now there's a direct and no fuss way for our leadership to take money out of our pockets.

        Insider trading without all the large institutional investors or otherwise rich people. It's those large or powerful investors that mostly keep the insider trading in check. Otherwise, the stock market would be just like Polymarket and Kalshi.

    • If the rates are similar to other forms of gambling than the majority wouldn't be due to insider information. Edge cases will be, but unless you think they have inside information about the weather, the rates between Polymarket and regular gambling wins are relatively consistent as detailed in the article.

    • by CommunityMember ( 6662188 ) on Sunday May 10, 2026 @11:33PM (#66137502)

      It's just up to various forms of insider information. Not trading because this isn't trades this is gambling.

      You make it sound like the rich getting richer using insider information is a bad thing? You must not be among the fraction of 1%.

    • by BinBoy ( 164798 ) on Monday May 11, 2026 @03:44AM (#66137698) Homepage

      Worse than the stock market. At least in the stock market you can buy and hold and ride the market up.

    • by martin-boundary ( 547041 ) on Monday May 11, 2026 @05:11AM (#66137786)
      It's not gambling when a participant can act on insider information.It's a rigged system.

      The comparison with casino games is not appropriate. The casino merely biases the outcome to give players a less than even chance of winning. That chance is low, but guaranteed to be nonzero, and the gamblers are able to agree to the conditions of the game in full.

      Insider trading causes the "gambler" to be deliberately misled into thinking a particular game is being played when it is not.

      • It's not gambling when a participant can act on insider information.It's a rigged system.

        Are you under the impression that horse races aren't, occasionally, rigged? That the 'insiders' bet based on insights they get from owners, trainers, stable hands, and jockeys?

      • by jsepeta ( 412566 )

        it's more like carnival games - completely rigged, and not really fun for anyone who realizes that it's rigged

    • Insider trading is already banned on these platforms and stocks actually have far more upside for insider trading than prediction markets.
    • It's just up to various forms of insider information. Not trading because this isn't trades this is gambling.

      It's literally trading, the gains are someone else's loses, that's simple. It is worse than gambling, _because_ it's a trading platform. You can buy low odds, pump it up, then take your profits before the contract is resolved. It's the worst of the stock market with the worst of gambling.

  • by rsilvergun ( 571051 ) on Sunday May 10, 2026 @09:36PM (#66137376)
    Or just regular sports betting. The silly stuff gets all the press but in reality it's all just a sports betting platform. It was just a stupid way to get around state regulations using the current incredibly corrupt national government.
    • If it's regular sports betting, then people aren't winning because of insider information.
      • by Anonymous Coward
        oh you sweet summer child
        • Match fixing is a thing but in the major sports, the TV revenue is larger than betting revenue by several orders of magnitude.
          • by Registered Coward v2 ( 447531 ) on Monday May 11, 2026 @06:33AM (#66137832)

            Match fixing is a thing but in the major sports, the TV revenue is larger than betting revenue by several orders of magnitude.

            Very true, but betting on games makes people more likely to watch tehm, driving viewership and TV revenue. Major sports may decry the impact of gambling and run all the Addicted? Call ... ads hey want, but the reality is gambling helps driver viewership which brings in money so you can do the math...

            • And how many games can now only be viewed through a gambling app?

              Why the hell did we allow this to become legal? Sports betting has never been good for the game or the audience.

      • Yes they are. e.g. as mentioned here [yahoo.com]

        Both Rozier and former NBA player and coach Damon Jones have been charged in federal court with sharing inside information on injuries with bettors, who were able to profit by betting proposition unders.

        • It's a question of scale. Where do you find more insider trading, in a heavily regulated sports betting system, or on an open unregulated trading platform where people can make bets on literally anything?

          In sports betting insider trading is rare enough that I bet you had to look up a case of it to make your point. On the flip side on Polymarket it is common enough that I can mention multiple instances of insider trading (and also suspected instances) from the past 2 months alone.

      • by ceoyoyo ( 59147 )

        Of course they are. People who know that the team bus got in late last night, Joe stubbed his toe, whatever. Or just "insiders" who actually know something about the sport and aren't just betting on their favourite team to win the way they do every weekend.

        Most betting on things that aren't completely random is going to have a strong element of fleecing the casuals. The actual insider betting (and trading) is a gradient with a somewhat arbitrary threshold too.

      • There is a huge problem with insider information in sports betting. For example somebody is slightly injured and that hasn't been talked about in public because the person in question can still play just not at 100%. Or there are trades that are being worked on. Or any one of the number of other pieces of information that frankly is to in the weeds for me a non-sports nerd to understand how to use.

        The reason you're having a hard time with it is that none of this is really insider information in the st
        • I was with you until the rabid, unwarranted, and unlikely partisan nonsense at the end. You should have stopped at "gambling is not", as continuing opened you up to criticisms like, "check your timeline", or, "gambling is regulated by the States, not the President", or, "this doesn't look like a partisan issue, check the list of States that do and do not allow it. New York and Arkansas allow it, California and Georgia don't."
    • The silly stuff gets all the press but in reality it's all just a sports betting platform.

      No it's not. Sports betting is heavily regulated.

      • " Sports betting is heavily regulated."

        Indeed, players not allow to bet, their moms have to.

      • by Himmy32 ( 650060 )

        Right, so if they can pretend that they aren't really sports gambling they have quite the competitive advantage...

        Dear Regulator, It's not gambling, It's complex financial instrument called hedging. Pinky swear, cross my heart, and hope to profit on insider trading!

  • by sziring ( 2245650 ) on Sunday May 10, 2026 @09:45PM (#66137384)

    Reflecting the real world. The 1% use insider information to generate more wealth by titling the odds in their favor. Hmmm

    • by titling the odds in their favor

      Last time I was titling the odds, the only "wealth" I generated was a prescription for acyclovir :|

    • by tlhIngan ( 30335 )

      Insider information or insider power. Both work just as well.

      Insider information is when you exploit information that isn't public. Insider power is when you influence the outcome to your favor.

      Many early sports bets used insider power - the player would get a cut of the profits if they tilted the game like faking an injury.

      Anyways, news like this is good. If people know these markets are rigged against them, they'd likely avoid using these platforms. It's why regulations exist - the SEC doesn't go after in

      • Anyways, news like this is good. If people know these markets are rigged against them, they'd likely avoid using these platforms. It's why regulations exist - the SEC doesn't go after insider trading because it wants a fair market, it does it because a fair market means more people will participate.

        No, they won't. The small percentage of people losing the most money are credulous morons and gambling addicts who think they have "a system" or some other kind of edge and just need one more to hit the big one.

  • Unstoppable, guarantees you even footing against insider trading and the worse the world does the better you do: https://youtu.be/IY9KJ5nn1yE?s... [youtu.be]
  • Actually 76.5% isn't very good. I expected it to be higher.
  • by retrobunnies ( 6948924 ) on Sunday May 10, 2026 @10:01PM (#66137398)
    As we're seeing, the market is manipulated. Yay for that.
  • What's the appeal on losing money to those with inside information?

  • by hdyoung ( 5182939 ) on Sunday May 10, 2026 @10:24PM (#66137420)
    "insidertrading.com"
  • When people start treating these casinos as a source of predictive information is when they'll become the most dangerous:

    https://insights.som.yale.edu/... [yale.edu]

  • Poker (Score:4, Insightful)

    by Bodhammer ( 559311 ) on Sunday May 10, 2026 @11:18PM (#66137474)
    If you're sitting at the table and you don't know who the mark is, it's you. It really is that simple.
  • Well, it's probably just the same old 1%.

  • Insider traders do better?

  • 1% of any group are criminals.

    If 1% are making more than 50% of money, then the obvious answer is that they are enganged in criminal activities.

    • Except you're going to find that all over the place. Why, you ask? Well, you're familiar with the Pareto 80/20 rule, right? 80% of effects are caused by 20% of inputs, and we find that almost everywhere. Plus, it compounds.

      Compounds? Yes!
      80% of that 80% is caused by 20% of the 20% - so, 64% is caused by 4%. That's squaring the rule. And what happens when you cube it? Well, you find that ~50% of effects are caused by ~1%. I think it's actually 51%+change and .8%, but still we should expect abou

      • Though since this is 1% being responsible for almost 80%, something does look amiss.
      • I find it so crazy that the natural numbers these laws come up with are evenly divisible human friendly numbers.

        The fact this is not the 17:83 rule is amazing!

        • I can't tell if you're being facetious (wouldn't hold it against you) or not. It is approximate, so maybe it does trend towards 17:83. There are also other common distributions - 70/30, 60/40, but 80/20 is the one that comes up the most often and in the most interesting places.
  • I always keep this rule in mind:

    If, after 15 minutes at the table, you don't know who the sucker is ... it's you.

    • Bingo! I've been giving "unofficial poker lessons" for years, teaching newcomers (to poker) how to play, by taking their money (on average of course). It's financed my poker hobby for many years now, though it doesn't really net me any money after tips, drinks, and food - but I'm ok with that as a hobby (I could tighten up and make some money, but I like to be loose from time to time just for fun). My favorite poker player is one who has been playing between 24 and 1000 hours. They think they are poker Gods
  • "A lot of users aren't that good at predicting the future" is just another way of saying the vast majority of the polymarket bettors are suckers. The old adage of "If you don't know who the sucker is, then you're the sucker" holds true for polymarkets. If you don't have insider information, especially illegal insider information, then you're just donating your money to those who do.

  • by NotEmmanuelGoldstein ( 6423622 ) on Monday May 11, 2026 @01:25AM (#66137616)
    It's important to remember this is zero-sum gambling, the entire market can't bet on the same outcome. But a professional player can take the same position on multiple bets. Some of the wins are due to the professional players having more information and doing number-crunching. That skews the market movement against the random guess of a casual punter, turning the punter into a 'mark'. It's why the casual punter always loses on sports betting and day-trading.

    But the biggest wins can only be insider trading.

    • Honest question: how is the first bet made? Does Polymarket float that one?
      • You're replying to someone who doesn't know what they're talking about. The platforms and other large trading houses are market making on these platforms. So that's how the first bet is made and it's very much not zero sum.
    • It's important to remember this is zero-sum gambling, the entire market can't bet on the same outcome.

      It is not zero sum. The usual suspects are market making as well at the platforms themselves. This is a critically important fact to know if you're trying to reason about how this all works.

      • Slightly less than zero sum, right? The house gets its cut no matter who wins.
        • I think it's a LOT less than zero sum in favor of the market makers who are close enough to the house in this context that it's a difference without a distinction.
  • by greytree ( 7124971 ) on Monday May 11, 2026 @03:11AM (#66137676)
    No surprise that we hear from the usual crowd of Commie moaners who have something against the simple everyday folk who use their hard-earned insider knowledge and White House tip-offs to advance themselves.
    • I like your joke and my Subject is the one I was looking for in the discussion. Just more "tools for fools" to help the richer get more obscenely rich.

      I'll add the horse race joke, since I'm pretty sure it also applies here, even though I'm basically too contemptuous of all gambling to spend time digging out the details for the polymarkets. However I'm pretty sure this is one of the scams where the house takes profits off the top. Therefore there are two cases for the gamblers. They might believe the game i

  • Just another way for insiders to grift, and fools to feel "part of something". Seems like it inherently encourages all sorts of unethical, illegal, and malicious behavior.
  • I'm shocked, shocked to find that manipulation is going on here in this gambling establishment.

  • Kinda obvious... big bets 15 minutes before trump runs his mouth. Of course, Congress has been this sort of thing for years and years in the stock market !
    • It is not unusual for the press to receive text copies of a President's announcements before they are made. The pool of potential insider traders may be larger than expected. Or not, I don't follow this much except to express disgust and dismay over the end-run around gambling laws.
  • The best advice about gambling I got was "If you don't know who the sucker is at the table, it's you."
  • Yea, I tried my hand at it, using analysis of the big "whales" but the system is definitely stacked against you. Some people have used it to arbitrage events like the weather, but there are diminishing returns there. The winner here is Polymarket and that tiny sliver of big whales betting on inside knowledge.

    • So, like every casino, every OTB, every bookie's...? It's almost like this is just gambling, but that can't the case - it has a totally different name!
  • by noshellswill ( 598066 ) on Monday May 11, 2026 @10:20AM (#66138194) Homepage
    Jeeez Louise ... enough already.  Gamblers lose money. News at 11 ...
  • If you take the number of congressmen and add in the high level staffers, you get about 1200.
  • "One user made $3 million since January on more than a million trades about the Oscars, according to TRM Labs..." Tell me this guy didn't work for that accounting house . . .
    • How did one person place a million bets on 24 4-contender outcomes? Shouldn't that have been 24 bets?
  • Who could have seen this coming?
  • to unsophisticated players? Gosh I never would have guessed that. As I recall, the old saying is, if you don't know who the sucker is sitting at the table, it's you.

  • "A strange game. The only winning move is not to play." -- Joshua / WOPR

  • "They appear to be pros making thousands of trades, mostly in the past year and a half, that were probably automated"
    Bots are taking everyone's money? Shocking! The fact that Don Jr. is on the board means none of Trump's cronies running the bots will get banned. Heck I don't see Polymarket banning anyone as long as they're making all that money.

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