Will Taylor Swift author a memoir (prose book) before her 40th birthday? (2029)
💡 What the odds say
The market puts this at about a 50% chance — a coin toss.
No money — just record your call and see if you were right. Yes is at 50% right now.
Data from Manifold’s public API, for informational purposes only. PredictPal is not affiliated with any platform and does not facilitate trading.
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How it resolves
Resolved by whoever created the market, at their discretion per the question's description. It's play-money (Mana) and not tied to an official source — treat it as a community forecast.
ⓘ A market settles under its own written rules, which can lag what looks decided in the news — so the price may not move to 100% the moment an outcome seems obvious.
View the official rules on Manifold ↗Related markets
Are people in the US getting dumber?
The 70% odds that Americans are getting dumber reflect a media-driven narrative linking AI tool use to cognitive decline, but the evidence is mostly anecdotal and lacks rigorous longitudinal data, making the market more a bet on cultural perception than on measurable intelligence.
Yes ≈ 70% chance
Highest box office-grossing movie in 2026 (US/Canada Domestic)
Despite The Odyssey's record-breaking $84M+ second weekend (Deadline, Jul 25), the market overwhelmingly favors Spider-Man: Brand New Day at 67%, suggesting a belief that franchise familiarity and pre-release hype will outweigh current box office surprises.
7 outcomes
Spider-Man: Brand New Day Tomatometer 92%+ on July 31, 2026.
The market expects Spider-Man: Brand New Day to fall short of a 92% Tomatometer score, with the 'Below 92%' option commanding 69% despite recent positive buzz from cast interviews suggesting a strong fan reception; the single biggest recent shift is a 1-point drop in the Yes (≥92%) probability over 24 hours, potentially reflecting skepticism after mixed reviews for other Marvel projects like 'The Punisher: One Last Kill' (Rotten Tomatoes, May 12).
2 outcomes
Will the documentary, "Instadocs: The prediction market games" be available on Netflix in July?
Yes ≈ 93% chance
Highest grossing movie in 2026?
The market is essentially flat with both listed candidates at 0% odds, but the biggest recent shift is the record-breaking performance of Christopher Nolan’s ‘The Odyssey’ in late July, which is not a market candidate — creating a glaring mismatch between box office reality and trader sentiment.
2 outcomes