Billionaire one-time wealth tax passes in California election 2026?
As of Oct 5, 2026, 4:23 PM ET, Polymarket priced this market at 31.5% (up from 30.5% 24 hours earlier). It had $38K traded in the past 24 hours, $134.7K of order-book liquidity and a bid-ask spread of 1.0 pts. probcast.co rates the support behind this price as moderate.
A repricing with partial backing — read the new probability with some caution.
The pricing has partial support: healthy trading volume and market depth, a tight spread.
How credible was the move?
Three separate questions — a move can be genuine while the latest price is still settling. Methodology →
Move validity
Is the move backed by real trading and depth?
ModerateThe pricing has partial support: healthy trading volume and market depth, a tight spread.
Consensus stability
Has the market settled at the new probability?
StableThe probability has held near its current level over the past several hours.
Contract clarity
Will the rules resolve without ambiguity?
HighThe resolution rules are relatively specific, with a named source and a defined deadline.
From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.
What this market actually measures
A one-time wealth tax on billionaires has been proposed to potentially appear on California's ballot for the November 3, 2026 general election. You can read more about that here: https://6abc.com/post/california-union-proposes-taxing-billionaires-offset-medicaid-cuts-low-income-people/18066430/ This market will resolve to "Yes" if any proposition containing a one-time tax targeting individuals, households, or family …
This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.
View full official resolution rules
A one-time wealth tax on billionaires has been proposed to potentially appear on California's ballot for the November 3, 2026 general election. You can read more about that here: https://6abc.com/post/california-union-proposes-taxing-billionaires-offset-medicaid-cuts-low-income-people/18066430/ This market will resolve to "Yes" if any proposition containing a one-time tax targeting individuals, households, or family units with wealth, assets, or net worth of at least $1 billion (USD or equivalent) passes in the named election. Otherwise, this market will resolve to "No". If no qualifying ballot initiative is certified to appear on the official statewide California ballot as a proposition to be voted on in the stated election by June 25, 2026, 11:59 PM ET (the official cutoff date for new initiatives to be approved), or if all qualifying propositions/initiatives are removed from the ballot or amended before the election such that the main threshold drops below $1 billion, this market will resolve "No". The primary resolution source for this market will be official information from the Government of the State of California, however a consensus of credible reporting may also be used.
What could move this market next?
- The market's deadline arrivesNovember 3, 2026 at 11:59 PM ET
The contract must resolve based on what has happened by this date.
Derived from the contract's own mechanics as of Oct 5, 4:27 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.
Advanced analysis (experimental)
Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: low · expected error ±16 pts.
What's happening
A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.
- Tight spread on a liquid, calm market
The latest price is a usable but caveated read — weigh it with the market state.
More details — reliability score, dynamics, durability
- Choppy / mean-reverting90%
- Stable consensus5%
- Thin-liquidity spike3%
Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.
Secondary read: leaning toward Thin market.
A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.
Market data
24h volume
$38K
Liquidity
$134.7K
Total volume
$3.9M
- Category
- Politics
- Venue
- Polymarket
- Open interest
- —
- Spread
- 1.0 pts
- Best bid
- 31.0%
- Best ask
- 32.0%
- 7-day range
- 30.5% – 32.0%
- Resolves
- Nov 3, 2026