Democratic Senate contracts climb as large Kalshi purchases draw attention
Polymarket's Democratic Senate control contract rose from 68.5 cents to 72.5 cents on Friday and Kalshi's rose from 67 cents to 71 cents, both up four points. The largest single trade was a 50,000-contract purchase of Kalshi's Democratic side at 71 cents at 12:19 PM ET, followed by about 26,000 contracts at the same price, with Polymarket carrying about 4.25 million dollars of liquidity.
Democratic Senate control contracts gained four points on both Polymarket and Kalshi on Friday, according to FinancialMarkets.com. Both finished the reported move above 70 cents.
Prices rise across both exchanges
Polymarket’s contract advanced from 68.5 cents to 72.5 cents, while Kalshi’s rose from 67 cents to 71 cents. The equal increases left Polymarket priced 1.5 cents above Kalshi.
The moves put both exchanges on the same side of the 70 percent implied-probability threshold. The supplied reporting does not identify what prompted the repricing.
Kalshi records the largest trade
According to FinancialMarkets.com, the largest single trade was a purchase of 50,000 contracts on Kalshi’s Democratic side at 71 cents at 12:19 PM ET. That was followed by about 26,000 contracts at the same price.
Polymarket, meanwhile, carried about 4.25 million dollars of liquidity. That figure describes liquidity rather than the size of an individual transaction and should be distinguished from the reported Kalshi purchases.
What it means for prediction markets
- Both exchanges registered a four-point increase, showing a parallel shift toward Democratic Senate control in their quoted prices.
- Polymarket remained 1.5 cents higher than Kalshi after the moves; the exchanges converged in direction, not price.
- The large Kalshi purchases provide evidence of buying at 71 cents, but the supplied reporting does not establish whether they caused the broader repricing.
Sources & attribution
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