The S&P 500 reaches a new all-time high before January 2028.

Question

Six frontier AI models put this at 83% by 9 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

83% — the median of 6 frontier models, resolving by 2029-10-09.

Answer

Gemini (Google): 88% — Over a 14-month horizon, nominal earnings expansion and eventual monetary easing routinely drive broad equity indices to fresh peaks. Historically, the S&P 500 records a new all-time high in over 85% of rolling 14-month spans unless mired in a multi-year balance-sheet bust. Corporate S&P 500 earnings are projected to compound at 8-12% through 2027, pulling valuations upward absent severe margin contraction. A sustained stagflation shock forcing aggressive Fed tightening past 5.5% represents the primary failure condition.

Answer

Claude (Anthropic): 93% — Historically equities set new all-time highs regularly within 2-3 years absent a severe sustained crisis. S&P 500 has reached new all-time highs within 2 years in the vast majority of post-WWII cycles, even after major corrections. Over a 27-month window (Oct 2026-Jan 2028) there's ample time for recovery given current elevated valuations and no base-case recession signaled. Main risk is a severe multi-year bear market or structural crisis (e.g. major war, debt crisis) that prevents recovery within this window.

Answer

GPT (OpenAI): 88% — Absent a prolonged recession or inflation shock, a two-year window strongly favors a nominal record high. The index has repeatedly recovered to new highs within a few years after ordinary corrections, aided by earnings growth and inflation. No regulator or vote is required; corporate profits, Fed policy, and investor risk appetite can produce an intraday record before January 2028. A deep 2027–28 recession, renewed high inflation forcing restrictive rates, or a major geopolitical shock would most reduce the odds.

Answer

Grok (xAI): 68% — Whether the Oct-2026 drawdown from the prior ATH is fully retraced by end-2027. Earnings growth and Fed easing must resume within ~15 months; a 2027 recession would push the high past the deadline. Post-WWII 10-20% corrections typically recoup in 9-18 months, so this window sits near the median. A sharp 2027 earnings miss or geopolitical shock would most change the odds.

Answer

DeepSeek (DeepSeek): 78% — This turns on whether the current drawdown is a garden-variety correction or the start of a genuine bear market. The S&P 500 has historically recovered to new all-time highs within 2-3 years of even severe bear markets, and within months of ordinary corrections. The Fed has already begun cutting rates, which historically supports equity recovery within 12-18 months, well inside the window. The main risk is a deep recession that extends the drawdown beyond 2028, which would require a sharper earnings collapse than currently priced.

Answer

Qwen (Alibaba): 78% — S&P 500 historically recovers to new highs within ~2 years of any correction; the question is whether this cycle breaks that pattern. Since 1950, the S&P 500 has reached a new ATH within 24 months of a prior peak in roughly 80% of cases, even after 20%+ drawdowns. The window is over 2 years (Oct 2026–Jan 2028), which is generous; only severe structural breaks (2008-style banking crisis, prolonged deflation) have delayed recovery… A recession starting in 2025–26 that deepens into a systemic credit event would be the main scenario pushing this below base rate; absent that, nominal GDP growth and…

The S&P 500 reaches a new all-time high before January 2028.

The Reserve Bank of New Zealand raises its official cash rate at its 29 October 2026 meeting.

The Bank of Canada raises its policy interest rate at its 29 October 2026 meeting.

The Bank of Japan raises its inflation forecasts in its 30 October 2026 outlook report.

The Bank of Japan leaves its policy rate unchanged at its 30 October 2026 meeting.