Record midterm trading volume masks sensitivity to small Senate wagers

Election-related contracts traded on Kalshi and Polymarket totaled nearly 1.9 billion dollars as of Monday, according to Cointelegraph, citing a Washington Post analysis. That marked a record for a midterm cycle.

The volume milestone came alongside a warning about liquidity: a large aggregate trading figure does not necessarily mean individual contracts can absorb selling without substantial price changes.

Senate contract highlights liquidity concerns

Kelly Ye, head of research at Talos, cautioned that just 300,000 dollars of selling would have shifted Kalshi’s contract on Democrats winning the Senate by ten points, according to Cointelegraph. The warning described potential price sensitivity, rather than an actual ten-point move.

With a median trade near 10 dollars, the figures highlight the distinction between typical transaction size and the selling pressure capable of moving a contract. For readers interpreting election prices, the relevant question is not only how much has traded across platforms, but how sensitive a particular market is to incoming orders.

What it means for prediction markets

• Record volume is not a liquidity guarantee. The nearly 1.9 billion dollars covered election-related contracts across Kalshi and Polymarket; Ye’s warning concerned one Kalshi Senate contract.
• Price moves need context. The estimate that 300,000 dollars of selling could move the contract ten points suggests that order flow could materially affect its price without necessarily reflecting a comparable change in electoral expectations.
• Trade size and market depth are different measures. A median trade near 10 dollars describes typical transaction size, not how much selling a market can absorb at prevailing prices.