Will Apple release a foldable iPhone by September 15?

Logged 3 Sept 2026, 03:29 UTC · Brier 0.0400

• The settlement requires actual availability for purchase by Sept 15 — a typical Sept 8 event implies pre-orders Sept 11 (qualifying) but in-store availability Sept 18 (not qualifying), making the interpretation of 'pre-order as purchase' decisive and uncertain (~60/40 in favor of counting).
• Signal evidence (Kuo, Gurman, supply-chain reporting through 2025) genuinely supports a foldable in Apple's 2026 lineup, but reports also flagged mass-production slippage risk into late 2026/2027, putting P(foldable in the Sept 2026 event) near 50% rather than near-certain.
• Even conditional on a September announcement, premium, supply-constrained Apple products are often staggered (iPhone X: announced Sept, pre-orders late Oct), so P(pre-order by Sept 15 | announced) is roughly 55-65%.
• My independent ~20% sits modestly below the market's 26%; the gap is plausibly explained by thin volume ($3.3k/24h) and traders overweighting 'release year = 2026' headlines while underweighting the purchase-availability clause and the iPhone X-style stagger precedent.

What would change it: Apple confirming a September event where the foldable opens for pre-order on or before Sept 15 would push this to ~80%+; conversely, an event invite/coverage cycle with no foldable mention by Sept 8 collapses it toward 2-3%.

-6.0 probability points from the market at generation · med confidence · Polymarket

Base rate: Apple has never made an entirely new iPhone form factor available for purchase within days of its September event, and its flagship releases (e.g., iPhone X, Vision Pro) have historically involved announce-to-availability gaps of weeks to months.

Chosen by hand.