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Factor · EQUITY_INDEX · SP500_INDEX_LEVEL

S&P 500 close, year-end 2026

Horizon Dec 31, 2026 (205 days)·4-model distribution·Repolled daily·Last update Jun 8, 2026

What will the S&P 500 Index (SPX) official close be on the final trading day of 2026?

Crene p50
7,105
Cross-model median across Claude, GPT, Gemini, Grok.
Confidence
LOW

spread ±675

p5—p95 band
5,660 → 8,690

90% interval

Models
Mixed

width ±3,030

The three supporting readings tell you how much weight to put on p50: confidence reflects cross-model spread relative to scale, the p5—p95 band shows the 90% interval each model collectively places, models shows whether the four agree on shape.

Latest distribution

p5
5,660
p25
6,215
p50
7,105
p75
7,844
p95
8,690

Belief trajectory

Cross-model percentile distribution over time. Outer band p5—p95, inner band p25—p75, line p50. Repolled daily at 06:35 server time.

3,2905,1216,9518,78210,613Jun 8Jun 4May 31May 27May 22May 12May 11
Consensus p50
Claude
GPT-4o
Gemini
Grok
p5–p95
p25–p75

Per-model distributions

Each model forecasts the quintile distribution independently. The Crene aggregate is the median of each percentile across these four models.

Claude
claude-haiku-4-5-20251001
p5
6,068
p25
7,548
p50
7,918
p75
8,288
p95
8,880

TODAY=7400; BAND=-25% to +35%; P50_LOGIC=+7% drift reflects stable macro, moderating growth, typical H2 seasonality without regime break.; TAILS=Upside driven by Fed cuts+AI acceleration; downside by unexpected recession/shock.

GPT-4o
gpt-4o-mini
p5
5,900
p25
6,200
p50
6,800
p75
7,200
p95
8,000

TODAY=7412; BAND=[-25% to +35%]; P50_LOGIC=Given the current value, moderate growth is expected through the end of 2026, accounting for potential fluctuations in the market. TAILS=Extreme scenarios could arise from macroeconomic shifts, such as significant interest rate hikes or a surprising recession, which may pressure the index downwards or robust earnings and economic growth boosting it upwards.

Gemini
gemini-2.5-flash-lite
p5
4,486
p25
5,556
p50
6,500
p75
7,400
p95
8,500

TODAY=7412; BAND=[-0.25, 0.35]; P50_LOGIC=P50 is slightly below the current observed value reflecting some normalization from current highs, but still bullish given ongoing tech innovation; TAILS=A severe global recession or geopolitical crisis would drive the low end, while an unprecedented productivity boom would drive the high end.

Grok
Grok
grok-4-fast-non-reasoning
p5
5,420
p25
6,230
p50
7,410
p75
8,520
p95
9,650

TODAY=7412; BAND=-25% to +35%; P50_LOGIC=Anchored at current 7412 with modest positive drift within normal equity move band. TAILS=Left tail driven by recession or policy shock; right tail by continued AI-driven earnings growth.

Resolution

Resolved value is the official S&P 500 closing index level on the final regular trading session of calendar year 2026, in index points.

Primary sourceSPGLOBAL · SPX · view
VerificationCBOE · SPX · view