Congress Probes Polymarket and Kalshi for Insider Trading

Published: 2026-05-22 16:11:15 |

The U.S. House Oversight Committee has opened a probe into crypto prediction markets Polymarket and Kalshi over concerns that U.S. government employees could use insider information to profit from policy, geopolitical, and military-related events. Committee chair Rep. James Comer says he is requesting internal records from both platforms’ CEOs, including identity verification, geographic restriction enforcement, and systems for detecting anomalous or suspicious trading activity. Comer also hinted at potential legislation to restrict participation by members of Congress and other government officials. This scrutiny follows earlier industry concerns about potential market integrity and security issues tied to Polymarket, including an on-chain incident involving the UMA CTF Adapter contract on Polygon and reports of funds drained from related addresses. For crypto traders, the Polymarket and Kalshi investigation raises headline and compliance tail risks. Expect potential impacts on prediction-market liquidity and sentiment, especially for contracts linked to politically sensitive or national-security themes. Related context: estimates project the prediction market sector could reach ~$1T by 2030, with rapid growth already drawing bipartisan regulatory attention.

Bearish

Because this is a regulatory and integrity-focused probe into Polymarket and Kalshi, it increases compliance uncertainty, headline risk, and the likelihood of friction around U.S.-related participation and enforcement. While it is not directly tied to spot demand for POL, such actions can reduce liquidity and raise risk premia in prediction-market narratives that use Polygon infrastructure, which can weigh on POL price expectations in the near term. Over the long term, sustained scrutiny could force operational changes and tighter controls, keeping market structure risk elevated rather than creating a clear catalyst. Net: negative for near-term sentiment tied to POL usage and prediction-market flows, hence bearish.