When Insiders Show Up: Two Cases That Tested Prediction Markets

Prediction markets are valuable because informed people participate. That’s the whole point: prices mean something because someone, somewhere, knows more than the crowd and puts money on it.

But two recent cases showed where that logic starts to break — when “informed” turns into “has access nobody else could ever have.”

informed ≠ has access

Case one: the Google engineer

Michele Spagnuolo, a Google software engineer, made roughly $1.2 million trading Polymarket under the handle “AlphaRacoon.” He had access to Google’s confidential “Year in Search” data before it went public, and traded on it, sometimes within hours of seeing it. His sharpest bet: he correctly called that the singer d4vd would be the most-searched person of 2025, at a moment when Polymarket’s own odds gave that outcome next to no chance.

a winning streak on a public chain = a spotlight

Here’s the part I find most interesting: other traders noticed him before any investigators did. People in Discord communities started tracking his wallet and copying his bets once his winning streak got too consistent to be luck. On a public blockchain, that’s what a winning streak becomes — a spotlight.

new handle, same wallets

When online sleuths started publicly asking questions about AlphaRacoon’s trades in December 2025, Spagnuolo changed his account handle. It didn’t matter. Everything on-chain is public and permanent, and federal investigators traced the wallets back to him anyway — he now faces charges of commodities fraud, wire fraud, and money laundering.

Case two: the soldier

Around the same time, Master Sergeant Gannon Ken Van Dyke, a U.S. Army Special Forces soldier, was charged with using classified information from the operation to capture Nicolás Maduro — codenamed Operation Absolute Resolve — to trade Venezuela-related markets on Polymarket before the raid happened. He made roughly $400,000 across 13 bets placed in the week leading up to the operation. He’d signed non-disclosure agreements promising never to divulge exactly this kind of information.

same question

Two very different people — a tech employee and a soldier. Two very different kinds of information. The same underlying question.

The gray area

Markets want informed participants. A political analyst betting on an election, an esports fan who watches every match, a nerd who reads SEC filings for fun — that’s the mechanism working. Their knowledge is earned, and anyone could, in theory, earn the same.

Access is different. Nobody outside Google could see “Year in Search” early. Nobody outside that operation could know what Van Dyke knew. When the edge is structurally unavailable to everyone else, the price stops reflecting collective research and starts reflecting a leak.

Traditional finance spent a century building rules around exactly this line. Prediction markets are speedrunning that process right now, in public.

What the platforms did

Polymarket tightened its rules in March 2026 — before either of these cases became public — explicitly barring trades on confidential information or attempts to influence real-world outcomes.

90+accounts sent to law enforcement

That timing matters, because in the soldier’s case, it wasn’t investigators who caught the pattern first. Polymarket’s own compliance team flagged Van Dyke’s trading and referred it to the DOJ and CFTC directly — the first time federal prosecutors have ever charged someone over prediction market bets. The platform says it has referred more than 90 accounts to law enforcement since.

Whether rules alone can stop this is still an open question. What’s already worked, at least twice: transparency itself. Spagnuolo wasn’t caught by a compliance department first, he was noticed by other traders staring at a public ledger. Van Dyke was caught because the platform was actually watching.

What this means if you trade

The practical takeaway hasn’t changed, but these cases sharpen it. One of these gets you a durable skill. The other, apparently, gets you traced, charged, and written about by people like me.

For the other big risk nobody prices in, read Prediction Market Resolution: The Risk Nobody Prices In.