Prediction market insider trading, in plain terms
Do you actually know who is on the other side of your contract when you bet on what a president will say in next week’s speech? It can be the person holding the script. Prediction market insider trading is the use of private, non-public knowledge about a real-world event to buy or sell contracts on that event before the information becomes public, and it differs from the stock market version in one way that matters enormously: there is no company, no boardroom and no obvious list of people who owe anyone a duty of silence.
That gap is now being argued over in the open. A report published by gamblinginsider.com on 23 October 2026 set out the problem directly: the Commodity Futures Trading Commission wants exchanges to work out who their insiders actually are, after a settlement involving Gabriel Perez, the White House teleprompter operator who traded contracts on words and phrases Donald Trump might say. Perez made $107,539.02 in trading profits between December 2025 and February 2026. He was ordered to hand back the profits, pay a $65,000 civil penalty and accept a three-year trading ban.
What follows is the set of beliefs most bettors carry into these markets, why each one is wrong, and what it costs you to keep believing them.
Myth one: it’s a sportsbook with politics on the menu
A prediction market is an exchange, not a bookmaker. You buy an event contract that settles at $1 if the stated outcome happens and $0 if it doesn’t, so a price of 62 cents reads as roughly a 62% implied probability. Common markets cover elections, Federal Reserve rate decisions, corporate announcements, award shows, and — as the Perez case showed — whether a specific phrase gets spoken on a specific stage.
How contract pricing differs from bookmaker odds
A sportsbook sets the price. It builds a margin into both sides of a market, which is why the implied probabilities of a two-way market add up to more than 100%, and it manages its own liability by moving lines or limiting accounts. A prediction market does none of that. Price comes from the order book: other traders, bidding and offering against each other, with the venue taking a commission or trading fee instead of an overround.
The practical consequence is the part people skip. On a sportsbook you are betting against a risk desk that can refuse you. On an exchange you are betting against whoever is willing to take the other side, and nothing stops that person from being better informed than you by definition rather than by analysis. Fees and the bid-ask spread still make the average uninformed participant a net loser over time; the exchange format removes the bookmaker’s margin, not the arithmetic.
Myth two: an insider is an executive, so this is a securities problem
Securities law defines insiders narrowly. It generally turns on material non-public information held by someone with a duty to a company and its shareholders: officers, directors, employees, and people who receive tips from them. The whole structure assumes an issuer at the centre.
Prediction markets have no issuer. The “company” is reality. So the people with the edge are whoever happens to sit structurally close to the event itself, and that set is enormous and badly defined:
- Campaign and party staff who see internal polling, field data and timing of announcements before anyone else.
- Employees, advisers and counterparties who know a merger, product launch, resignation or earnings surprise is coming.
- Production and communications workers — speechwriters, teleprompter operators, publicists, award-show vote counters — who handle the literal content a contract resolves against.
- Anyone personally close to the subject of a market about a career move, a relationship, a court appearance or a health event.
The gamblinginsider.com report makes a second point that is easy to miss and worse than the first: some of these people can also influence the outcome, not merely foresee it. Someone who can nudge a phrase into a speech, or time an announcement, is no longer trading on information asymmetry. That is market manipulation with extra steps.
Which markets are most exposed? Rank them by how few people need to know the answer in advance. A contract on an aggregate like a national election result is hard to corner because the information is diffuse. A contract on whether one named person says one named word, or signs one specific document on one specific day, is vulnerable to a handful of people — sometimes one.
Myth three: traditional sportsbook rules already cover this
They don’t, and the reason is historical. Sportsbooks spent decades building insider controls because the abuse pattern was obvious and repetitive: a player or official fixing a result, a physio leaking an injury, a tipped team-sheet. Leagues, regulators and integrity monitors converged on a narrow, well-mapped problem with a known population of insiders — the people on the pitch and in the dressing room. You can write a rulebook against a known list.
| Dimension | Traditional sportsbook | Prediction market |
|---|---|---|
| Who the insider usually is | Player, coach, official, club staff | Anyone structurally close to a real-world event |
| Size of that population | Defined and listable | Open-ended, often unknown to the venue |
| Who polices it | Gambling regulators, leagues, integrity units | Exchange compliance plus, in the US, the CFTC |
| Rulebook maturity | Decades of precedent | Being written now, case by case |
| Defence available to the venue | Limit or void bets, refuse accounts | Order book absorbs the trade; price moves instead |
| Who absorbs the loss | The bookmaker | The other traders, including you |
That final row is the one to sit with. When an informed bettor beats a sportsbook, the house eats it. When an informed trader beats a prediction market, the counterparties eat it, and the counterparties are retail participants reading the same news you are.
Myth four: if nothing is illegal, nobody is watching
Half right, which is the dangerous kind of wrong. Event contracts listed on US-regulated exchanges fall under the CFTC, and the Perez settlement shows the commission is prepared to use its enforcement powers: disgorgement, a civil penalty and a trading ban, without needing a securities-style insider case. Betting on non-public knowledge can absolutely get you in trouble.
What is unsettled is the boundary. There is no mature, generally accepted definition of who counts as an insider across every event type, no equivalent of the sports world’s known-persons lists, and the division of labour between commodities regulators and gambling regulators varies by platform and jurisdiction. Offshore and crypto-settled venues sit further outside that perimeter again. The honest description is a regulatory gray zone that is narrowing through individual enforcement actions rather than a finished rulebook, and anyone telling you where the line definitively sits is guessing.
Reading a market for signs of asymmetry
You cannot see the identity of the person taking your side, but you can read the market’s behaviour. Before committing money to an event contract, work through this:
- Check the traded volume and depth. A market with thin liquidity and a wide spread can be moved by one well-funded participant, and your fill price tells you very little about real probability.
- Match price moves against public news. A 15-point swing with no reporting behind it is the single clearest signal that someone is trading on something you cannot see.
- Look at how few people would need to know. Narrow, personality-driven and date-specific contracts carry far more insider risk than broad aggregate outcomes.
- Read the venue’s rules on employee and insider trading, and on who may participate in markets about their own organisation. If no such policy is published, treat that silence as information.
- Watch the order flow around the move. One large position repricing the whole book behaves differently from hundreds of small trades converging on a new view.
- Check the resolution source and wording. Ambiguous settlement criteria give an advantage to whoever is closest to the arbiter.
None of this proves anything on its own. The same pattern — sharp move, no news — is produced both by an insider and by a genuinely sharper analyst who got there first. You are reading probabilities about probabilities.
The trade-off that has no clean answer
Here is what makes this harder than the critics admit. Prediction markets are accurate because informed people trade them. The reason a contract price beats a pundit is that someone with better information was paid to reveal it by taking a position. Strip out every participant with an informational edge and you don’t get a fairer market, you get a worse forecast and a venue with nothing to distinguish it from a casino table. Enforce too little and retail traders become the funding source for people who already know the result.
There is no setting of that dial that satisfies both goals, and the exchanges’ commercial interest sits on the side of more trading rather than less. Expect the boundary to keep being drawn by enforcement actions like the one against Perez, one unusual job description at a time.
So treat an unexplained odds move as a reason to step back rather than to pile in, and ignore anyone offering you an “inside tip” — at best it is wrong, at worst it makes you a party to someone else’s enforcement problem. If you trade these markets, accept plainly that you are taking on more uncertainty than a regulated sportsbook offers, size your positions accordingly, and set deposit and loss limits before the first contract rather than after. Betting on human behaviour is a form of gambling, not a forecasting hobby with upside; if it stops feeling like a cost you chose, take a break and use the self-exclusion tools your platform provides.