Polymarket's biggest miss this morning is the U.S.-Iran ceasefire extension contract: YES trades at 78c, but our fair value is only 42c YES, which means the real edge is buying NO around 22c when we think it should be closer to 58c. Across today's five selected answer flips, the pattern is consistent: traders are paying for upbeat headlines and volatility, while underpricing formal deadlines, implementation friction, and resolution mechanics.
All five markets were still open as of April 18, 2026. The strongest opportunities are the geopolitical contracts where the market is extrapolating broad deal optimism too directly, and the weekend crypto contracts where the market is underestimating how often a near-strike asset revisits the trigger price.
- The U.S.-Iran ceasefire extension contract looks materially overpriced on YES because diplomacy is active but a formal extension is still not locked.
- Iranian oil-sanctions relief in April is being priced as if any diplomatic progress automatically means oil relief, which is not what the latest enforcement actions show.
- Bitcoin and Ethereum YES contracts look too cheap because both assets are already close to the strike and have enough realized range left to win.
- Tesla's $420 April market still has squeeze risk, but the path is harder than a 60c YES quote implies.
5 Mispricings at a Glance
US x Iran ceasefire extended by April 21, 2026?
Why we disagree: Diplomacy is live, but no formal extension is locked and the blockade is still active.
Will Trump agree to Iranian Oil sanction relief in April?
Why we disagree: The market is pricing a generic deal, while Washington is still tightening actual oil-sanctions enforcement.
Will the price of Bitcoin be above $78,000 on April 19?
Why we disagree: BTC has already traded through the strike and remains close enough that one more risk-on burst can win.
Will Ethereum reach $2,500 April 13-19?
Why we disagree: ETH only needs one more sharp upside move and tends to show higher beta in late-stage risk-on rebounds.
Will Tesla reach $420 in April?
Why we disagree: Traders are paying for Tesla squeeze potential while weak deliveries and earnings risk still cap the path to $420.
How to read this: Polymarket Top Answer and Naly Top Answer show the final answer each side sees as most likely. Max Payout if Correct shows the gross upside from the current quote to the $1 settlement if the selected contract side wins. The horizontal graph still shows where that selected side sits on a 0c to $1 range for Polymarket versus Naly.
US x Iran ceasefire extended by April 21, 2026?
The quoted market price here is YES at 78c, which means a trader pays $0.78 for a $1 payout if the contract resolves YES and the market is implying roughly 78% odds on that same side. Our separate estimate is 42% YES, so the fair price on the YES leg is 42c; this is a clean answer flip because Polymarket's top answer is YES while ours is NO. That means the trade we prefer is NO at 22c, where max payout if correct is 78c, while the fair-value edge is 36c because we think NO should be closer to 58c.
Causal Chain
Key Factors
| Factor | |
|---|---|
| AP reported on April 17 that Iran reopened the Strait of Hormuz to commercial vessels, but Trump said the U.S. blockade on Iranian ships and ports will remain in force until a deal is reached. | |
| Axios reported on April 17 that Trump expects a weekend meeting and possible progress, but also said significant gaps remain in the three-page framework. | |
| Al Jazeera reported on April 16 that no date had been locked for the next round of talks, which matters because this contract needs a formal extension by deadline, not just vague diplomatic momentum. | |
| The market appears to be conflating general de-escalation with a specific extension event, even though those are different resolution paths. |
Bayesian Calculation
Alternative explanation: The market may be assuming that a near-term peace package will either include an explicit extension or be interpreted as functionally equivalent to one. If weekend talks produce signed language quickly, YES can still reprice higher in a hurry.
Fresh Checks
Will Trump agree to Iranian Oil sanction relief in April?
The quoted market price here is YES at 52c, which means a trader pays $0.52 for a $1 payout if the contract resolves YES and the market is implying roughly 52% odds on that same side. Our separate estimate is 25% YES, so the fair price on the YES leg is 25c; this is another answer flip because Polymarket's top answer is YES while ours is NO. That means the trade we prefer is NO at 48c, where max payout if correct is 52c, while the fair-value edge is 27c because we think NO should be closer to 75c.
Causal Chain
Key Factors
| Factor | |
|---|---|
| Reuters reported on April 14 that the U.S. would not renew the waiver on Iranian oil at sea and that the waiver expires this weekend, which is the opposite of imminent relief. | |
| Treasury also warned foreign financial institutions about secondary sanctions, reinforcing a harder rather than softer enforcement posture. | |
| Axios reported on April 17 that talks were centered on frozen funds, uranium stockpiles, and enrichment terms, not a clean rollback of oil sanctions. | |
| Trump publicly pushed back after the Axios scoop by saying no money will change hands, which shows even limited concessions are not settled. | |
| The market may be overestimating how quickly a White House that just hardened oil enforcement can pivot to relief before April 30. |
Bayesian Calculation
Alternative explanation: The market may be assuming that Trump will decide cheaper oil matters more than hawkish consistency and that any war-ending framework will need an oil concession to stick. If that political calculus shifts, YES can move quickly.
Fresh Checks
Will the price of Bitcoin be above $78,000 on April 19?
The quoted market price here is YES at 27c, so entry costs $0.27 for a $1 payout if the contract resolves YES and the market is implying roughly 27% odds on that side. Our separate estimate is 52% YES, so the fair price on that same YES leg is 52c; this is an answer flip because Polymarket's top answer is NO while ours is YES. On the side we prefer, max payout if correct is 73c on YES, while the fair-value edge is 25c because we think YES should trade closer to 52c than 27c.
Causal Chain
Key Factors
| Factor | |
|---|---|
| Latest market check: BTC traded at $77,265 with an intraday high of $78,242, so the market has already printed above the strike once. | |
| Yahoo Finance reported on April 14 that Bitcoin topped $75,000 as crypto rallied on resumed peace-talk optimism. | |
| Yahoo Finance and Bloomberg reported on April 8 that BTC hit a three-week high after the U.S.-Iran ceasefire plan and improving spot ETF flows. | |
| The remaining gap from current price is small relative to today's realized range, which raises the odds of a successful revisit. | |
| The real bearish case is contract mechanics: one specific April 19 print matters more than any temporary spike. |
Bayesian Calculation
Alternative explanation: The market may be right if the recent rally was mostly short covering and spot demand fades once weekend liquidity thins. In that case, the strike can stay tantalizingly close without being there at the exact print that matters.
Fresh Checks
Will Ethereum reach $2,500 April 13-19?
The quoted market price here is YES at 29c, meaning entry costs $0.29 for a $1 payout if the contract resolves YES and the market is implying roughly 29% odds on that side. Our separate estimate is 55% YES, so the fair price on the same YES leg is 55c; this is another answer flip because Polymarket's top answer is NO while ours is YES. On the side we prefer, max payout if correct is 71c on YES, while the fair-value edge is 26c because we think YES should trade closer to 55c than 29c.
Causal Chain
Key Factors
| Factor | |
|---|---|
| Latest market check: ETH traded at $2,419.01 with an intraday high of $2,463.67, leaving only about $36 from today's high to the strike. | |
| Yahoo Finance reported on April 14 that Ethereum rallied 8.6% during the latest risk-on burst. | |
| Yahoo Finance also reported on April 14 that Bitcoin and Ethereum were approaching two-month highs on optimism over U.S.-Iran peace negotiations. | |
| Ethereum only needs a modest additional move versus today's realized range, which is why a 29c YES price looks light. | |
| The short clock is real, but the contract asks for a reach inside the window, not prolonged stability above $2,500. |
Bayesian Calculation
Alternative explanation: The market may be right if traders rotate back into Bitcoin, if weekend liquidity fades, or if ETH simply underperforms on the last leg of the rebound. Near-miss setups often look easier than they are.
Fresh Checks
Will Tesla reach $420 in April?
The quoted market price here is YES at 60c, which means a trader pays $0.60 for a $1 payout if the contract resolves YES and the market is implying roughly 60% odds on that side. Our separate estimate is 38% YES, so the fair price on the YES leg is 38c; this is another answer flip because Polymarket's top answer is YES while ours is NO. That means the trade we prefer is NO at 40c, where max payout if correct is 60c, while the fair-value edge is 22c because we think NO should be closer to 62c.
Causal Chain
Key Factors
| Factor | |
|---|---|
| Latest market check: TSLA traded at $400.62 with an intraday high of $409.21, still short of both the target and the April high needed for a clean breakout. | |
| AP reported on April 2 that Tesla delivered 358,023 vehicles, below the 381,000 analysts had expected. | |
| Tesla Investor Relations says Q1 2026 earnings arrive on April 22, concentrating both upside squeeze risk and downside guidance risk into one event. | |
| Yahoo Finance reported on April 14 that Barclays warned Tesla could be facing a negative $3 billion free-cash-flow hole. | |
| The stock needs about 4.8% from the latest price, or about 2.6% above the recent April high, to reach $420. |
Bayesian Calculation
Alternative explanation: The bulls can still be right if investors keep treating Tesla as an autonomy and robotics call option rather than an auto stock. In that frame, weak deliveries matter less than a single new narrative spark.
Fresh Checks
Conclusion
The next 72 hours carry most of the information risk. Weekend U.S.-Iran diplomacy will determine whether the geopolitical YES contracts are pricing real implementation or just hopeful headlines, Sunday crypto prints will decide whether near-strike volatility was underpriced, and Tesla's path to $420 will increasingly run through the April 22 earnings setup. Those are the catalysts most likely to close, widen, or invalidate today's edges.
Methodology
We treat each binary share as a $1 contract. A 78c YES price implies roughly 78% market odds on YES, while the opposite side can usually be bought near 22c before fees and spread. Our fair values come from separate probability estimates built from fresh reporting, base rates, current market levels, and the exact deadline mechanics of each contract. You can review our historical calibration and outcomes on the track record page.
Disclaimer
This article is for research and informational purposes only, not investment advice. Prediction-market prices move quickly, liquidity can be thin, and even a correctly framed thesis can lose money because of timing, fees, or resolution rules.