Proposition 42, a November 2026 California constitutional amendment on the ballot, would bar new state taxes on personal property ownership such as investments and retirement accounts while limiting certain retroactive levies tied to pre-enactment residency or conduct. Trader consensus sits near even because the measure directly competes with Proposition 40, the proposed one-time wealth tax; under constitutional rules the higher-vote initiative prevails if both pass. Governor Newsom has signaled opposition, and recent budget negotiations plus qualifying signature thresholds have kept both measures in play without clear polling separation. Key variables that could shift odds include upcoming campaign spending patterns, endorsements from business groups versus revenue advocates, voter turnout in coastal versus inland counties, and any late legal challenges to either proposition's validity.