SPY 1-day forecast by Grok 4.5
Grok 4.5's 1-day forecast for SPY, made 2026-09-03: expected range $765.00 to $781.00 at 42% confidence. Settled at $770.24: 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 | $773.12 |
| Price the model reported | $773.17 |
| Expected range | $765.00 to $781.00 |
| Confidence | 42% |
| Prompt style | No data |
| Status | Settled |
| Actual close | $770.24 |
| Traded range in the window | $769.00 to $772.87 |
| Result | No directional call |
| Score | 53.4 of 100 |
The model's reasoning
(1) What you found, and where: Thursday 3 Sep 2026 close was $773.17 (up 1.05% from Wednesday’s $765.16), day range $767.45-$774.03, volume ~36-41M, per CNBC, MarketWatch, Investing.com and TradeSmith. After-hours held near $772.40-$772.60. Prior closes: 2 Sep $765.16, 1 Sep $761.78.
(2) The current market regime as you read it: Solid rebound session extending the prior day’s recovery. SPY advanced more than 1% with a constructive intraday range, reflecting improved risk appetite and continued stabilization after the early-week softness. Broader indices followed a similar upward bias.
(3) Price range justification, with the levels and volatility you are using: Anchored to the $773.17 Thursday close. Recent daily ranges of $5-8 and typical ATR near $6 support a 1-day window of roughly ±1%. Lower bound near $765 allows for a retest of the prior close; upper bound near $781 covers extension toward recent highs around the mid-770s to 779 area. Range is modestly wider on the upside reflecting the rebound momentum.
(4) Scheduled or likely catalysts inside the window: No major U.S. economic releases typically scheduled for Friday 4 Sep that would dominate the broad market. Residual follow-through from Thursday’s strength and any overnight geopolitical or rate-related developments remain the primary potential drivers.
(5) The strongest counter-argument, and what would invalidate your call: A sharp risk-off reversal or weaker global cues could push SPY below $765; stronger continuation could drive a break above $781. Sustained trade outside the stated range would overturn the mild bullish lean.
(6) Why your confidence is the number it is: Live Thursday close is confirmed and the session direction is constructive, yet single-day forecasts remain noise-dominated in the absence of high-impact scheduled data; residual macro uncertainty keeps conviction moderate.
Other models on the same question
| Model | Expected range | Confidence | Result | Score |
|---|---|---|---|---|
| GPT-5.6 Luna | $760.00 to $782.00 | 72% | Direction called correctly | 83.0 |
| Gemini 1.5 Pro | $765.00 to $780.00 | 60% | No directional call | 54.3 |
| DeepSeek-R1 | $768.00 to $780.00 | 60% | Direction called incorrectly | 31.3 |
| Claude Opus 5 | $757.00 to $785.00 | 45% | Direction called correctly | 79.7 |
| Claude Sonnet 5 | $757.00 to $785.00 | 45% | Direction called correctly | 79.7 |
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.
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