Trepa and Fireplace shutter as Kalshi and Polymarket seize 93% of volume
Prediction market platforms Trepa and Fireplace announced shutdowns within 90 minutes of each other on Aug. 10. Kalshi and Polymarket captured 93.3% of prediction market volume across the sector. The twin closures highlight consolidation of trading activity around the two largest regulated venues. Crypto.com and Trump Media are also adjusting their prediction market operations. Fireplace was a prediction market trading terminal.
Trading volume is now a killing field for challengers. Kalshi and Polymarket's 93.3% share leaves thin margins for anyone outside the duopoly, and two shutdowns in a single afternoon show how fast capital drains when liquidity concentrates. For operators like Crypto.com and Trump Media, the message is blunt: retrench or face the same fate as Trepa and Fireplace.
The consolidation rewards the two leaders with deeper order books and lower effective spreads, which lures more volume in a self-reinforcing loop. A platform that cannot crack double-digit market share quickly loses the liquidity that attracts serious traders. The next quarterly volume report will reveal whether any remaining challenger still has a pulse.