Across 2 prediction market platforms, "Billionaire one-time wealth tax passes in California election 2026?" has a consensus probability of 34.2%. Polymarket: 36.5%, Manifold: 32.0%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.
Computed from 2 platforms using geometric mean of odds (Satopaa et al., 2014). This method was validated by the IARPA ACE forecasting tournament as the most accurate probability aggregation technique. Full methodology →
The only prediction market aggregator with academically validated cross-platform consensus.