Which party will gain most seats in Russian Parliamentary Election?

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Active sub-markets

Market context

Legislative elections for Russia’s State Duma are scheduled to take place between 18 and 20 September 2026, with 450 seats contested in the lower house of the Federal Assembly[1]. United Russia currently holds a dominant position, having secured 324 seats after the 2021 election with 49.8% of the vote[1]. The market in question assesses which party will gain the most seats compared to pre-election levels, not which party wins the most overall, a distinction that explains the current 2% probability assigned to the “Other” outcome[2].

Historically, Russian parliamentary elections have shown minimal seat turnover for opposition parties, with United Russia maintaining its majority across multiple cycles[1]. The only party showing potential for growth since 2021 is New People, which has held second place in recent polls with 13.4% support[4]. Comparable cases from 2016 and 2021 reinforce the pattern of limited opposition gains, suggesting that a significant shift in seat distribution remains an outlier event rather than a baseline expectation[1].

Traders should monitor official announcements regarding constituency boundary changes, as authorities are already adjusting single-mandate zones ahead of the 2026 vote[7]. Key catalysts include the Kremlin’s preparation strategy, which marks the first State Duma election since the war against Ukraine began[3]. Recent polling data from VCIOM and campaign positioning by New People, LDPR, and Just Russia will also shape expectations[4]. Regulatory frameworks such as Germany’s GlüStV and US CFTC reach influence market accessibility, while “no-KYC up to $1,500” allows broader participation without identity verification for smaller trades.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Which party will gain most seats in Russian Parliamentary Election? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.