The proposed 2026 Billionaire Tax Act, a citizen-initiated measure to impose a one-time 5% levy on the net worth of California residents above $1 billion, has advanced toward the November ballot after supporters submitted more than 1.5 million signatures in late April. Trader consensus favoring rejection at this stage reflects organized opposition from business groups citing risks of resident exodus, valuation disputes, and potential constitutional challenges under state and federal rules. Recent polling absence and divided support among some labor unions and Democratic lawmakers underscore the uncertainty, consistent with historical patterns where California voters have rejected targeted tax increases on high-net-worth individuals despite early qualification efforts. Upcoming signature verification by June and anticipated campaign spending will shape the contest ahead of the general election.