Mention Market Volume Soars to $117 Million
A speculative new form of trading has expanded rapidly on prediction platforms, with monthly volume on Kalshi alone surging from just $22,000 in January 2025 to $117 million in January 2026. This practice, known as "mention trading," allows users to bet on whether public figures will say specific words during events like speeches or earnings calls. Since launching the product in 2024, Kalshi has listed over 1,000 such markets. Its competitor, Polymarket, has listed over 600 mention markets since 2021 and plans to expand the offering on its new U.S. platform.
This growth reflects a broader culture of accessible, event-driven speculation. Traders range from casual participants, like one who won $64 on December 17 by correctly betting Donald Trump would say "hottest," to data-driven analysts who scour transcripts for statistical advantages. The trend gained wider visibility after Coinbase CEO Brian Armstrong intentionally listed buzzwords during an October 30 earnings call, acknowledging an active prediction market tied to his speech.
Insider Trading Fears Grow After $329k Late-Night Bet
The rapid expansion of mention markets is shadowed by significant concerns over market integrity and insider trading. In January, Kalshi quietly suspended markets tied to late-night talk shows, which are typically pre-recorded. The move followed a January 21 event where bets on comedian Martin Short's appearance on "Jimmy Kimmel Live!" reached $329,000 in volume. Just hours before the show aired, contracts for words Short later said—"Trump," "Selena," and "Golden Globes"—spiked in value, suggesting traders with advance knowledge had secured guaranteed profits. Kalshi's rules prohibit insider trading, but the incident highlighted the potential for abuse.
These vulnerabilities have drawn criticism from former regulators. Timothy Massad, who chaired the Commodity Futures Trading Commission (CFTC) during the Obama administration, expressed significant reservations.
I see why they’re fun to trade for a lot of people, but the risks of insider trading, manipulation and disputes over settlement are very real, and I don’t think the CFTC is well-equipped to address those risks.
— Timothy Massad, Former CFTC Chairman
CFTC Eases Oversight as Trump-Linked Markets Expand
The growth in mention trading coincides with a significant loosening of regulatory oversight from the CFTC. The commission recently abandoned a Biden-era initiative that sought to block prediction markets from offering contracts on sports and elections. This deregulatory shift is notable given that Donald Trump's eldest son serves as an adviser to both Kalshi and Polymarket. Furthermore, Trump's social media company has announced its own plans to launch a prediction market.
The potential for manipulation was highlighted when a trader claimed on social media to have successfully goaded Trump into saying specific words at a rally to benefit his own bets. The trader later retracted the statement, calling it a joke. However, the episode underscores the unique risks of markets tied directly to the speech of public figures, especially in a less restrictive regulatory environment.
