Concerns Rise Over Trading Volumes in Prediction Markets Kalshi and Polymarket
- Observers question the accuracy of trading volumes on prediction market platforms Kalshi and Polymarket.
- Unusual trading patterns, specifically low-odds contracts, raise suspicions of inflated volumes or wash trading.
- CFTC is reportedly examining trades on Kalshi’s ether perpetual futures contract amid ongoing scrutiny.
Recent trading activity on prediction market platforms Kalshi and Polymarket has sparked concerns among industry observers regarding the potential inflation of trading volumes. At Polymarket, a noticeable quirk on its international exchange—unregulated by U.S. authorities—has been identified. Specifically, markets with multiple contracts show higher activity on those with lower probabilities of success compared to those with higher odds, particularly in areas such as elections, sports, and central bank decisions.
On September 20, a user on the social media platform X raised alarms about unusual patterns in Kalshi’s ether perpetual futures market. A large proportion of trades centered around amounts of $5,500, contributing to a 24-hour trading volume significantly higher than the actual resting liquidity. CNBC’s analysis noted that roughly half of the dollar volume in Kalshi’s ether perpetuals originated from trades priced between $5,495 and $5,505.
Such developments have led some analysts to speculate that these platforms might be experiencing inflated volumes or, more seriously, wash trading, where traders collude to create a misleading perception of market activity. Both Kalshi and Polymarket firmly deny the occurrence of wash trading and assert that the trading patterns do not indicate inorganic activity.
Tamika Bent, a partner at K&L Gates, highlights that designated contract markets have the responsibility to safeguard market integrity by monitoring conditions, price fluctuations, and volumes for any irregularities. As Polymarket seeks funding at a valuation exceeding $20 billion following the launch of its U.S. exchange in May, and Kalshi reportedly aims for a $40 billion valuation as it seeks funding post-launch of its perpetual futures product, the reliability of these trading volume figures becomes increasingly crucial.
Andre Guettler, a finance professor, posits that if a significant portion of reported perpetual volume is artificially created, the apparent trading demand might exaggerate valuations, which is especially pertinent for retail investors considering a public listing. In contrast, Polymarket’s head of revenue and analytics, Kyle Gesuelli, asserted that activity surrounding low-odds contracts reflects the actions of active traders identifying mispricings, rather than wash trading.
As scrutiny continues, Kalshi reiterated that it found no evidence of wash trading and that hundreds of users were involved in the flagged transactions. However, experts emphasize that the ratio of daily trading volumes to actual liquidity is concerning, indicating potential market inefficiencies. The Commodity Futures Trading Commission (CFTC) is reportedly investigating the trades on Kalshi’s ether perpetual futures, though this has not been independently verified.
CFTC Chairman Michael Selig stated in a recent CNBC appearance that the agency maintains a “zero tolerance policy” towards manipulative trading practices, including wash trading. As both companies consider transitioning to public markets next year, the present situation raises urgent questions about the authenticity of their trading volume metrics.
Unusual Contract Activations and Trading Patterns
Reports have surfaced about low-odds contracts on Polymarket attracting unusual trading activity, with past analyses noting discrepancies in market volumes for electoral contracts. For example, a contract concerning JD Vance’s potential candidacy for the Republican presidential nomination received less volume than a similarly placed contract around Elon Musk, even though Musk is ineligible for presidency.
Additionally, Polymarket’s sports-related contracts exhibited strange trading behaviors. During the lead-up to the 2026 FIFA World Cup, significant funds were traded on the odds of unlikely teams winning, such as Egypt and Morocco. Concurrently, in a contract concerning Ethiopia’s prime ministerial election, Prime Minister Abiy Ahmed, who had a high probability of winning, saw significantly less trading volume compared to a low-probability challenger.
The ongoing debate continues as both Kalshi and Polymarket navigate the complexities of a rapidly evolving market landscape, with evolving trading patterns prompting calls for increased oversight and transparency.
News Courtesy of CNBC
