**The upcoming September 27 indirect Senate election, renewing 178 seats via an electoral college of local officials, drives current pricing, with Les Républicains positioned to experience a modest contraction from their pre-election total of 131 seats.** Analysts across French reporting anticipate LR losses of roughly three to ten seats, concentrated in Mediterranean departments where RN-UDR alliances are competitive in proportional contests. This reflects RN’s push to reach the ten-seat threshold for its first formal group without altering the broader right-center majority alongside the Union Centriste. Traders assign the highest probability to the 121-124 band, consistent with these localized shifts and LR’s stronger retention in majoritarian districts, while lower bands capture upside or downside risks from final turnout among the roughly 93,000 grands électeurs. The market resolves after official certification in October.