Citigroup sees potential bond rally as Polymarket odds shift for midterms

Polymarket traders are pricing in a 48% chance that Democrats sweep both chambers of Congress in the 2026 midterms. Citigroup thinks that probability, if it keeps climbing, could spark a rally in the bond market. The prediction platform’s “Balance of Power: 2026 Midterms” market has attracted nearly $10 million in cumulative trading volume, with $2.5 million wagered specifically on the Democratic sweep outcome. Those aren’t trivial numbers for a blockchain-based betting market, and they’re catching the eye of institutional analysts who increasingly treat Polymarket as a real-time sentiment gauge. The political math behind the bond thesis Breaking down the individual components makes the sweep scenario look plausible. Polymarket traders currently give Democrats an 88% chance of winning the House, a number that reflects the historical pattern of the president’s party losing ground in midterm elections. The Senate race is tighter, with Democratic odds hovering around 51-53%. A Republican Senate paired with a Democratic House currently trades at 38%, while a full Republican sweep trails at roughly 13-14%. For Citigroup, this political arithmetic has direct implications for fixed-income...