CFTC warns mention market contracts carry manipulation risk

The Block reported that the Commodity Futures Trading Commission warned that prediction market contracts based on whether someone mentions specific words or attends an event carry a heightened risk of manipulation.

CFTC staff posted the advisory on Tuesday, noting that such instruments face strict restrictions on listing. The agency stated, "This advisory is intended to alert DCMs [designated contract markets] that Mention Market contracts may present a heightened risk of susceptibility to manipulation."

The warning follows recent enforcement actions targeting insider trading on prediction platforms. An order requiring payment of $172,000 was issued to a former White House teleprompter operator due to trading based on early knowledge of remarks made by President Trump. Separately, former Rep. George Santos agreed to a $35,000 settlement over a Kalshi bet on his State of the Union attendance, which the CFTC said was affected by his public statements two weeks prior to the address.

The advisory directs designated contract markets to assess whether the individual controlling the contract outcome has obligations that deter conduct designed to affect settlement. Staff also recommended that these markets implement proactive trading rules to block manipulation.