Highest volume prediction market for 2028 US prez election?
As of 11:42 UTC on 11 Nov 2026, “Kalshi” leads “Highest volume prediction market for 2028 US prez election?” on Manifold at 55%, followed by “Polymarket” at 36% and “Other” at 4%, out of 8 outcomes. The event has M$9.2k in Manifold-reported 24-hour volume. pdata.world tracks it alongside markets from 8 prediction-market platforms.
Only trading volume on the final US 2028 presidential election results will count (e.g. Trump v Harris, ie no primary races). Any real-money prediction market or betting platform globally counts. I will exclude obvious wash trading insofar as I'm able to spot it (not an important factor in the 2024 election, but it might be in the future if these platforms continue to operate without fees). I may add more answers to this market if new serious competitors emerge.