Someone appears to have been very good at guessing what a poll would say before anyone else could read it.

Polymarket has opened an internal investigation after identifying a series of well-timed trades placed hours before two New York Times/Siena College polls were made public. The suspicious pattern was flagged by researchers at Vanderbilt University, and their findings were subsequently reported by the New York Times.

The pattern includes a bet of approximately $191,277 on Nebraska Republican Senator Pete Ricketts winning re-election, placed on October 31, 2026. A NYT/Siena poll released soon afterward showed Ricketts ahead by six points, and the trader pocketed more than $77,000 on the position.

A $2 Million Deposit and Two Well-Timed Calls

The sequence of events is what caught the researchers' attention. On October 30, at around 5:30 p.m. ET, more than $2 million landed in an anonymous crypto wallet. The account then began placing sizable bets on Polymarket, a crypto-based prediction market where traders buy and sell contracts tied to real-world outcomes and contract prices function as implied probabilities. According to the Vanderbilt research, roughly $191,000 of the deposited funds went toward wagers on Ricketts holding his Senate seat.

Before the poll was published, the market gave Ricketts approximately a 67% chance of winning re-election. After his six-point lead became public, those odds climbed to about 79%. That jump is what turned the position into a profit of more than $77,000.

The Nebraska trade was not a one-off. The same trader also put more than $622,000 behind the Democratic nominee in the Michigan Senate race. After a subsequent NYT/Siena poll was released, that position ultimately generated profits exceeding $180,000.

In total, the account cleared more than $257,000 across the two races — a scale of positioning that illustrates the kind of money that can sit against scheduled information releases in prediction markets.

What Researchers and Platforms Are Saying

Brett Goldstein, the Vanderbilt researcher involved in the work, was careful not to accuse anyone of wrongdoing outright, but he made clear that the timing of the trades looked off.

"Requires further investigation," he said, describing the activity as hard to dismiss as simple coincidence and deserving of a closer look.

Polymarket confirmed that it had detected the trades and had begun its own review of the activity, though the company did not announce any conclusions or penalties. The Vanderbilt research also covered Kalshi, the other major prediction market named in the findings. Kalshi declined to comment. The open threads from here are the conclusions of Polymarket's review and whether the wallet's controller is ever identified.

Why Polls Are an Obvious Target

Major media polls are scheduled events, and a small group of people — including pollsters, editors and production staff — see the results before they are published. That advance access is what makes scheduled polls a target for traders in prediction markets, and it is why questions about who saw the numbers first cut to the core of how these platforms operate.

The crypto element adds another wrinkle to the case. Because the funding came through an anonymous wallet, the trades themselves are visible on-chain, but the identity of the person or group behind them is not. Researchers were able to trace the $2 million deposit and the timing of the bets with precision, yet they could not determine who actually controlled the funds.

This article was originally published by CryptoBriefing.