The 2026 French Senate election on September 27 renews 178 seats through indirect voting by an electoral college of local officials, with the Groupe Socialiste, Écologiste et Républicain (SER) defending roughly 30-31 of its current 64 seats. Recent municipal results and departmental projections indicate modest net losses for SER amid competition from centrists and right-leaning lists, yet the group's local implantation and left alliances support expectations of limited erosion rather than sharp decline. Trader probabilities cluster tightly around 56-64 seats because Senate contests hinge on granular outcomes in key departments, candidate unity, and small shifts in grand électeur preferences, with few decisive national swings emerging in the final weeks. Late developments such as alliance adjustments or turnout variations among local officials could still widen the range before group declarations close in October.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedSER Seat Count after French Senate Election?
SER Seat Count after French Senate Election?
59-61 37%
62-64 27%
56-58 22%
71+ 7.1%
$11,244 Vol.
$11,244 Vol.
Oct 31, 2026
<56
1%
56-58
22%
59-61
37%
62-64
27%
65-67
7%
68-70
1%
71+
7%
59-61 37%
62-64 27%
56-58 22%
71+ 7.1%
$11,244 Vol.
$11,244 Vol.
Oct 31, 2026
<56
$581 Vol.
1%
56-58
$2,992 Vol.
22%
59-61
$3,759 Vol.
37%
62-64
$1,537 Vol.
27%
65-67
$671 Vol.
7%
68-70
$599 Vol.
1%
71+
$1,105 Vol.
7%
The 2026 French Senate election is scheduled for September 27, 2026, renewing série 2 — 178 of the Senate's 348 seats. The new senators are currently scheduled to take office on October 1, 2026, and the deadline for submitting new political-group membership lists and political declarations is currently set for October 5, 2026, at 4:00 PM CEST.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.The 2026 French Senate election on September 27 renews 178 seats through indirect voting by an electoral college of local officials, with the Groupe Socialiste, Écologiste et Républicain (SER) defending roughly 30-31 of its current 64 seats. Recent municipal results and departmental projections indicate modest net losses for SER amid competition from centrists and right-leaning lists, yet the group's local implantation and left alliances support expectations of limited erosion rather than sharp decline. Trader probabilities cluster tightly around 56-64 seats because Senate contests hinge on granular outcomes in key departments, candidate unity, and small shifts in grand électeur preferences, with few decisive national swings emerging in the final weeks. Late developments such as alliance adjustments or turnout variations among local officials could still widen the range before group declarations close in October.
The 2026 French Senate election is scheduled for September 27, 2026, renewing série 2 — 178 of the Senate's 348 seats. The new senators are currently scheduled to take office on October 1, 2026, and the deadline for submitting new political-group membership lists and political declarations is currently set for October 5, 2026, at 4:00 PM CEST.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.
Market Opened: Aug 19, 2026, 3:52 PM ET
Volume
$11,244End Date
Oct 12, 2026Market Opened
Aug 19, 2026, 3:52 PM ETResolver
0x69c47De9D...The 2026 French Senate election is scheduled for September 27, 2026, renewing série 2 — 178 of the Senate's 348 seats. The new senators are currently scheduled to take office on October 1, 2026, and the deadline for submitting new political-group membership lists and political declarations is currently set for October 5, 2026, at 4:00 PM CEST.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.The 2026 French Senate election on September 27 renews 178 seats through indirect voting by an electoral college of local officials, with the Groupe Socialiste, Écologiste et Républicain (SER) defending roughly 30-31 of its current 64 seats. Recent municipal results and departmental projections indicate modest net losses for SER amid competition from centrists and right-leaning lists, yet the group's local implantation and left alliances support expectations of limited erosion rather than sharp decline. Trader probabilities cluster tightly around 56-64 seats because Senate contests hinge on granular outcomes in key departments, candidate unity, and small shifts in grand électeur preferences, with few decisive national swings emerging in the final weeks. Late developments such as alliance adjustments or turnout variations among local officials could still widen the range before group declarations close in October.
The 2026 French Senate election is scheduled for September 27, 2026, renewing série 2 — 178 of the Senate's 348 seats. The new senators are currently scheduled to take office on October 1, 2026, and the deadline for submitting new political-group membership lists and political declarations is currently set for October 5, 2026, at 4:00 PM CEST.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.
This market will resolve according to the number of French Senate seats held by the Groupe Socialiste, Écologiste et Républicain (SER) as of October 12, 2026, 4:00 PM CEST.
The seat count will be the group's total membership as published by the French Senate (senat.fr), counting members (membres), related (apparentés), and affiliated (rattachés).
A group will qualify as the Groupe Socialiste, Écologiste et Républicain (SER) if it satisfies at least one of the following:
- Its official name includes "Socialiste, Écologiste et Républicain" or a clear variant thereof;
- Its political declaration published in the Official Journal (Journal Officiel) of France identifies it as a continuation of the group; or
- It is publicly recognized as the continuation of the Groupe Socialiste, Écologiste et Républicain (SER), and this characterization is confirmed by a consensus of credible reporting.
A group that changes its name will continue to qualify if it meets at least one of the criteria above. If the group merges with one or more other groups, this market will resolve according to the total membership of the merged group, provided the merged group meets at least one of the criteria above.
If no group qualifies, or group composition is not officially published, as of October 12, 2026, 4:00 PM CEST, this market will resolve to the lowest bracket.
The administrative meeting of senators not appearing on the list of any group (RASNAG) will not qualify as a group for the purposes of this market.
The resolution source for this market will be publications of the French Senate (senat.fr) and the Official Journal of France, and a consensus of credible reporting.
Volume
$11,244End Date
Oct 12, 2026Market Opened
Aug 19, 2026, 3:52 PM ETResolver
0x69c47De9D...The 2026 French Senate election on September 27 renews 178 seats through indirect voting by an electoral college of local officials, with the Groupe Socialiste, Écologiste et Républicain (SER) defending roughly 30-31 of its current 64 seats. Recent municipal results and departmental projections indicate modest net losses for SER amid competition from centrists and right-leaning lists, yet the group's local implantation and left alliances support expectations of limited erosion rather than sharp decline. Trader probabilities cluster tightly around 56-64 seats because Senate contests hinge on granular outcomes in key departments, candidate unity, and small shifts in grand électeur preferences, with few decisive national swings emerging in the final weeks. Late developments such as alliance adjustments or turnout variations among local officials could still widen the range before group declarations close in October.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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