Prices as of Wednesday, August 26, 2026, 5:29 p.m. ET. Record compiled from 15 dated sources; see the sourced record file for every citation.
Apple sent its invitations on Wednesday morning, August 26: "Surprise and shine," Wednesday, September 9, 10 a.m. Pacific, Apple Park. That answers half of the question people type into a search bar, and the market has answered the other half. On Kalshi, where a price in cents is the market's probability, the contract that pays out if Apple releases the iPhone 18 to the public before October 1, 2026 closed the day at 3 cents bid and 4 cents ask, about a 3.5 percent chance. A release before January 1, 2027 sits at 8 to 9 cents. The phone most people mean by "the new iPhone" is, by the market's reading, a spring 2027 phone.
The invitation names no products, and Apple has never said "iPhone 18" or "spring 2027" about the base model. What the market is trading is 15 months of consistent reporting. MacRumors carried analyst Ming-Chi Kuo and The Information on May 5, 2025 saying the standard model would ship six months after the Pro; by August 12, 2026 the same site reported that "Apple plans to release the iPhone 18 Pro, iPhone 18 Pro Max, and a foldable 'iPhone Ultra' this September, followed by the standard iPhone 18 model in the first quarter of 2027," with suppliers Largan Precision and Pegatron saying as much on earnings calls. On the day the invitation landed, 9to5Mac's Zac Hall put it flatly: "iPhone 18, iPhone 18e, and iPhone Air 2 following in spring 2027."
That is the streak at stake. The iPhone 17 went on sale Friday, September 19, 2025, the iPhone 16 on Friday, September 20, 2024, and every numbered base iPhone since Apple settled into its fall rhythm in 2011 has shipped in September beside its Pro siblings. The keynote will be the first under John Ternus, who becomes chief executive on September 1, the succession our next-Apple-CEO board priced in April.
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The Board
As of August 26, 2026, 5:29 p.m. ET (Kalshi, cents = probability; first number is what buyers offer, second what sellers ask):
| Outcome | Yes price (bid/ask) | Reads as |
|---|---|---|
| iPhone 18 released before October 1, 2026 | 3¢ / 4¢ | about 3.5% |
| iPhone 18 released before January 1, 2027 | 8¢ / 9¢ | about 8.5% |
Each rung pays out only on a public retail release of a phone named "iPhone 18," not an announcement; the July 1 rung already settled No, and a new April 1, 2027 rung has traded 30 contracts, too few to call a price. The October contract has leaked toward zero for a month, closing at 14 cents on July 31, 9 on August 3, 5 by August 12 and 3 to 4 today, while open interest nearly tripled from 215,000 contracts on July 28 to 612,700, so the low price is a crowd, not a rounding error. Wednesday was its busiest day this year, 95,700 contracts in a 1-cent to 11-cent range, and the tape shows both sides of the argument six minutes apart: at 11:48 p.m. ET on August 25 someone bought 10,000 Yes at 7 cents and 3,939 more at 9, about $1,050 staked to win about $13,900 if the streak holds; at 11:54 p.m. someone else bought 9,999 No at a 2-cent yes price, about $9,800 to win about $200. A 15,800-contract Yes sweep at 8 to 10 cents on Monday, August 24, the day Bloomberg's Mark Gurman said invitations were coming, did not survive the invitation: at 2:30 p.m. Wednesday one seller cleared both 2026 rungs, 7,200 No on the October rung down to a 2-cent yes price and 7,460 on the January rung down to 6. The January contract traded as high as 32 cents on August 9; it is 8 to 9 now, with 275,300 contracts open and 18,900 traded in the last 24 hours.
What the Models Think
We also put the question to a panel of forecasting programs we grade in public. Three of the panel's eight seats ran this board, without seeing the price, only the sourced record below; the other five were unavailable at run time, and we say so rather than backfill. Their middle answer put a base iPhone 18 on sale before October 1 at 5 percent, a point above the 4-cent market, and the widest gap between two of them was 3 points, from 3 to 6 percent. Their reason is the market's reason: the spring 2027 date is not one rumor but a chain, Kuo and The Information in 2025, then Gurman, Wayne Ma, Largan and Pegatron this August, and Apple's invitation is consistent with all of it. The highest seat landed there for the reason the Yes buyers exist, as one model put it: the base model "is widely reported as pushed to spring 2027, so YES needs a resolution-ambiguity ruling," meaning a Pro being counted as an iPhone 18. There is no disagreement to report; the forecasters and the money sit within two cents of each other, and both are pricing a rulebook more than a factory. These are model estimates, not predictions of fact and not financial advice.
How Apple's September Streak Got Split in Two
The split has three documented layers. The first is strategy. When Kuo described a two-season iPhone in May 2025, his stated reasons were "addressing the 'marketing gap' created by mainly Chinese competitors who typically release flagships in the first half of the year" and "preventing 'diluted marketing efforts'" as the lineup grows to six phones. Forbes' Ewan Spence, on July 28, 2026, added the money reason: "Apple is strategically delaying the entry-level iPhone 18 until Spring 2027, while launching the higher-margin iPhone 18 Pro models in September 2026." Take the $799 phone off the autumn menu and holiday upgraders buy the Pro; Spence also noted iOS 27's on-device Siri features need 12GB of memory, which only the Pros carry at launch.
The second layer is corroboration, which is why the price is single digits rather than teens. MacRumors' August 12 report stacked Kuo with Wayne Ma, formerly of The Information, Taiwan's Economic Daily News, and two suppliers talking about a first-quarter 2027 base model on earnings calls. The site's release-schedule guide, updated August 18, states it as fact: "We aren't going to get all of the iPhone 18 models in fall 2026, because Apple is holding the standard iPhone 18 until spring 2027." It is the same shape as our GTA 6 release-date board: a date the company has not spoken, priced off the people who build the thing.
The third layer is the calendar Apple did speak. On August 24, MacRumors' Joe Rossignol reported Gurman's call that "The event will likely take place on Wednesday, September 9, he said." Two days later the invitations went out. Forbes' David Phelan had worked the same pattern on August 3 to call invitations for August 26, a keynote on September 9 and the Pros on sale Friday, September 18; Apple has confirmed everything but the on-sale day. Nothing in that sequence has a base iPhone 18 in it. New to reading a contract like this? Our guide to how prediction markets work covers the mechanics.
The Memory Flood, the Price Hike, and the Contract That Says Ninety-Nine
Some of the delay is shortage, and that part is argued in public. On the July 30 earnings call, per Forbes' Jon Markman on August 6, Tim Cook said: "We're in what I would characterize as a 100-year flood on memory pricing with exponential increases in memory prices." Markman, citing semiconductor analyst Tim Culpan, put roughly $1 billion of finished A20 Pro chips at TSMC waiting on mobile memory that AI data centers are buying first, with memory and storage now about 27 percent of the iPhone 18 Pro's bill of materials, up from 9 percent on the 17 Pro. MacRumors carried the same report that day: "Apple is not able to stockpile finished dies and then add DRAM when it becomes available," the Pros "could sell out" at pre-order, and the foldable could cost "as much as $2,500." In January, Notebookcheck relayed ZDNet Korea's report that "Apple was only able to secure an LTA (Long-Term Agreement) for DRAM supply for the first half of 2026," half its usual term. Gurman's verdict on what that means for buyers, quoted by Phelan: "There is absolutely no doubt that Apple will raise iPhone prices, for a variety of reasons," with $100 to $200 his range and some analysts at $300. For this market the shortage cuts one way: a company short of memory for the phones it is shipping in September has no spare capacity to surprise anyone with a cheaper one.
The live dispute is about words, not chips. Polymarket runs a contract on whether Apple releases the iPhone 18 in 2026, and at 5:32 p.m. ET Wednesday it traded at 98.7 cents bid and 99.4 ask on $175,000 of volume. Its rules say "A new iPhone product released without a number, under a designation other than iPhone 18, will qualify if it retains the original functions of the iPhone and expands on them in such a way that it is clear that this product is a successor," so a September iPhone 18 Pro settles it. Kalshi's rule says only "If Apple Inc. releases iPhone 18 to the public before Oct 1, 2026, then the market resolves to Yes," and its traders, at 3 to 4 cents, have decided a Pro is not an iPhone 18. Kalshi has published no clarification. That gap is why Yes buyers keep appearing at 7 to 10 cents on a contract the reporting says is dead: they are betting on a ruling, not a calendar. Our Kalshi vs Polymarket comparison covers how the two exchanges write and settle rules.
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What Moves The Price From Here
Tuesday, September 1, 2026. Ternus takes over as chief executive. A new CEO's first keynote is the one place "surprise" could mean a lineup change; any report between September 1 and 9 that puts a base model on the stage lifts the October rung out of the single digits. Absent that, the January rung is the one to watch, because an 8-cent "one more thing" lives there.
Wednesday, September 9, 2026. The keynote. If the lineup is the iPhone 18 Pro, Pro Max and a foldable, as every outlet in the record expects, the October contract goes to a cent or two on the spot and the only question left is definitional. If Apple puts "iPhone 18" on the foldable's box, or Kalshi issues a rule note on whether a Pro counts, the January rung reprices to one extreme or the other within the hour.
Thursday, October 1, 2026. The October rung settles when the date arrives with or without a base iPhone 18 on sale; the Pros are expected on shelves Friday, September 18, so the record will show exactly which phones shipped. The January rung then runs through the holiday quarter to Friday, January 1, 2027, and the April rung waits for the spring the reporting keeps naming. This one settles on Thursday, October 1, 2026.
Hero illustration: OddsShopper, in the house collage style. Apple Park photo by Daniel L. Lu (user:dllu), licensed CC BY-SA 4.0; photos cropped, toned, and composited.
Prices quoted are live Kalshi market prices as of Wednesday, August 26, 2026, 5:29 p.m. ET, and will keep moving until this market settles on Thursday, October 1, 2026. OddsShopper covers prediction markets as an independent analyst: any model or panel figures referenced are model estimates, not predictions of fact and not financial advice. This article does not advocate for or against any candidate or party. Trading involves risk; contracts can go to zero.
