Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
13% | 87% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
13% | 87% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Market context
GameStop has formally submitted a non-binding $55.5 billion takeover bid for eBay, offering $125 per share in a 50% cash and 50% stock mix, yet eBay’s board has dismissed the proposal as neither credible nor appealing[2][4]. Despite CEO Ryan Cohen securing a $20 billion debt financing commitment from TD Securities and holding roughly 6% economic exposure to eBay, the market currently implies only a 13% chance of the deal succeeding before the end of 2026[1][5]. This low probability reflects a stark divergence between the aggressive headline of the bid and the cautious consensus among analysts who doubt GameStop’s ability to convert its derivative-heavy stake into voting control or secure the necessary investment-grade credit ratings for financing[7].
Historically, hostile bids from retail giants targeting e-commerce platforms rarely succeed without board cooperation, as seen in the failed attempts by traditional retailers to disrupt Amazon’s dominance over the past decade[9]. Comparable cases show that even with significant premiums—this offer represents a 46% premium to eBay’s unaffected price—transactions stall when the target firm’s leadership deems the acquirer’s financial structure unsustainable[5]. The current 13% implied probability aligns with analyst scepticism regarding Cohen’s strategy, suggesting that traders should view this not as a near-term certainty but as a speculative long-dated option on a potential shareholder revolt or board fracture[7].
Traders must monitor three critical catalysts: any formal tender offer launched directly to eBay shareholders, the outcome of a potential special shareholder meeting to elect new directors, and updates on TD Securities’ financing conditions contingent on credit ratings[7]. Recent reporting indicates Cohen may escalate pressure by taking the bid directly to shareholders if the board remains unreceptive, a move that could shift odds significantly if successful[1]. Investors should also watch for any public statements from eBay’s board regarding the review timeline, as delays often signal deeper resistance that could further depress the probability of a "Yes" resolution[4].
Methodology
We track Will GameStop acquire eBay? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
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
- 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 fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- 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.
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