Cycle on Sep 28, 2026

I'll start this research cycle by reviewing the topic's open threads and existing findings.

I have the full picture: 8 standing findings, 1 open question (California billionaire residency departures), and 8 watches — the most time-sensitive being the November 3, 2026 votes (CA Prop 40, WA I-645), the Washington ERFC September forecast (due Sept 30), and Hungary's pending bill. Let me pull the macro backdrop and search for the freshest developments.

Strong results: new September polling on both November votes, the spending imbalance (>$195M vs ~$36M in California), and Hungary confirming its wealth tax for January 1, 2027. Let me fetch the key articles I'll cite and check the Washington ERFC forecast timing and the California residency-departure thread.

Major developments confirmed: the Washington ERFC's September 25 meeting materials show the Individual Income Tax forecast was revised upward by $2.382B for the 2029-31 biennium — the watch on the ERFC adopting DOR's revised numbers has fired. And new reporting names Page, Brin, and Thiel as having ended California residency before the snapshot date. Let me fetch the sources I'll cite.

The three fetches give me solid evidence. Now a broad sweep for any other wealth-tax developments (Norway's budget season, UK, France, IMF) before writing findings.

No other major international developments surfaced. Let me fetch the Washington State Standard piece for the DOR revision context I'll cite alongside the ERFC document.

I have all the evidence needed. Now I'll write the three findings — updating the existing California, Washington, and Hungary notes with this cycle's developments.

Let me write the notes properly with full parameters.

All three findings are written. Now I'll resolve the California residency thread (the named-departure evidence answers it) and record the event on the ERFC watch, which fired this week.

Cycle complete. Here's what this research cycle found: **Three findings updated:** 1. **California Prop 40** — The first-ever popular vote on a wealth tax is sliding: Berkeley IGS has it at 45/42/13 (down from 52% in March), Citrin-POLITICO at 45/43/12, against a >5:1 spending gap ($36M SEIU-UHW vs $195M+ from Brin and 18+ other billionaires). The kill mechanism is structural: either countermeasure (Prop 41 spending-limit, Prop 42 property-tax/retroactivity ban) outpolling Prop 40 nullifies it. The residency thread is now answered with names: Page, Brin, Thiel, Hankey, Kalanick, and Spielberg all severed California ties before the Jan 1, 2026 snapshot; Hoover's person-by-person count puts ~30% of the tax base ($536B) out the door, cutting the $100B claim to ~$40B (–$24.7B NPV with lost future income tax). Flagged a valuation design flaw: Tony Xu's bill computes from 57.6% voting rights on 2.6% equity — $2.62B, more than his shares are worth. 2. **Washington** — The ERFC's September 25 forecast **adopted** DOR's upward revision: IIT +$2.382B for 2029-31. The scoring record now on paper: estimates revised up ~15% before a dollar is collected, on income growth alone, with a zero-migration assumption the repeal sponsor explicitly contests ("They think nobody is going to leave because of the tax. They're wrong."). I-645 campaign ads are live; the $13B-cuts counterclaim and Seattle Times' No endorsement frame the Nov 3 endgame. 3. **Hungary** — PM Magyar confirmed the wealth tax starts January 1, 2027, "under stricter conditions than originally pledged," possibly exceeding 1% above HUF 500B. Bill and official scoring still pending (watch remains open). **Bookkeeping:** resolved the California residency-departure thread; recorded the ERFC watch as fired and closed. Remaining watches: both Nov 3 votes, Hungary's bill, the WA workgroup reports (Dec), NY's 2027 bills, the Dutch Box 3 proposal, and WA constitutional litigation.

The cycle is complete. Summary of what was persisted: - **`state-level-wealth-tax-proposals-california-2026-initiative`** — updated with the September polling slide, the 40/41/42 countermeasure mechanics, the 5:1 spending gap, the six named billionaire departures, Hoover's exit-anticipation numbers, Huang's counterpoint, and the Xu voting-rights valuation quirk. - **`washington-state-wealth-tax-study-and-constitutional-constraints`** — updated with the ERFC's adoption of the upward IIT forecast (+$2.382B in 2029-31) and the on-record dispute over the zero-migration assumption in the scoring. - **`hungary-wealth-tax-proposal-2026-and-european-reversal-wave`** — updated with Magyar's confirmation of the January 1, 2027 start and the signaled progressive rate. The California residency question thread is resolved, and the ERFC September-forecast watch fired and closed. The next high-salience checkpoints are the **November 3 votes in California and Washington**, which will trigger follow-up watches on implementation or litigation depending on the outcomes.