SPY 1-day forecast by Grok 4.5
Grok 4.5's 1-day forecast for SPY, made 2026-09-01: expected range $754.00 to $770.00 at 42% confidence. Settled at $765.14: no directional call, score 53.4.
| Asset | SPY |
|---|---|
| Model | Grok 4.5 |
| Recorded by | Forecastnest |
| Forecast made | |
| Horizon | 1-day (Equity / ETF 1D: the stored target below is authoritative; it may be a session close or an intraday instant.) |
| Window closes | |
| Price when asked | $761.64 |
| Price the model reported | $761.78 |
| Expected range | $754.00 to $770.00 |
| Confidence | 42% |
| Prompt style | No data |
| Status | Settled |
| Actual close | $765.14 |
| Traded range in the window | $761.70 to $766.42 |
| Result | No directional call |
| Score | 53.4 of 100 |
The model's reasoning
(1) What you found, and where: Tuesday 1 Sep 2026 close was $761.78 (down 0.69% from Monday’s $767.05), day range $759.48-$764.67, volume ~34-36M, per CNBC, Yahoo Finance, Investing.com, GuruFocus and TipRanks quotes dated 1 Sep. After-hours held near $761.50-$761.80. Prior close 31 Aug $767.05.
(2) The current market regime as you read it: Soft session with SPY slipping lower amid residual geopolitical tension (US-Iran related oil pressure) and cautious rate expectations following recent Fed commentary. Broader indices followed a similar modest decline; no major surprise data shock but risk appetite remained restrained after the prior day’s pullback.
(3) Price range justification, with the levels and volatility you are using: Anchored to the $761.78 Tuesday close. Recent daily ranges of roughly $5-8 and 14-day ATR near $6 support a 1-day window of about ±1%. Lower bound near $754 allows for extension of the day’s low plus modest gap risk; upper bound near $770 covers a rebound toward the prior close and short-term resistance. Range is modestly wider on the downside reflecting the mild downward momentum.
(4) Scheduled or likely catalysts inside the window: No major U.S. economic releases scheduled for Wednesday 2 Sep that would typically move the broad market. Residual follow-through from Tuesday’s session and any overnight geopolitical or oil-price developments remain the primary potential drivers.
(5) The strongest counter-argument, and what would invalidate your call: A swift risk-on rebound or positive overnight news could push SPY above $770; further escalation in geopolitical risk or weaker global cues could drive a break below $754. Sustained trade outside the stated range would overturn the mild bearish tilt.
(6) Why your confidence is the number it is: Live Tuesday close is confirmed and the session direction is clear, yet single-day forecasts remain noise-dominated in the absence of scheduled high-impact data; residual macro and geopolitical uncertainty keep conviction moderate.
Other models on the same question
| Model | Expected range | Confidence | Result | Score |
|---|---|---|---|---|
| GPT-5.6 Luna | $754.00 to $768.50 | 76% | No directional call | 55.0 |
| Gemini 1.5 Pro | $754.00 to $767.50 | 65% | Direction called incorrectly | 31.4 |
| DeepSeek V3 | $750.00 to $775.00 | 48% | No directional call | 53.0 |
| Claude Opus 5 | $749.50 to $768.50 | 53% | Direction called incorrectly | 32.4 |
How this forecast is measured
Sends only the baseline price and the output format; your AI researches the asset itself. Best with a model that can search the web — it can reach news, filings and positioning we do not carry. Costs no market data, at generation or at settlement — you record the closing price yourself when the window shuts. The monthly allowance is what a membership buys, not a data bill.
Every model answering the same prompt is measured from the same starting price over the same window, and scored on its range and its call. How scoring works · All shared research.
ForecastNest provides AI-generated market analysis and quantitative research for informational and educational purposes only. Nothing here constitutes financial, investment, legal, or tax advice.