SPY 1-day forecast by Grok 4.5
Grok 4.5's 1-day forecast for SPY, made 2026-09-22: expected range $769.00 to $778.50 at 45% confidence. Settled at $769.72: no directional call, score 54.1.
| 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 | $773.48 |
| Price the model reported | $773.80 |
| Expected range | $769.00 to $778.50 |
| Confidence | 45% |
| Prompt style | No data |
| Status | Settled |
| Actual close | $769.72 |
| Traded range in the window | $768.37 to $774.94 |
| Result | No directional call |
| Score | 54.1 of 100 |
The model's reasoning
(1) What you found: Live quotes from TECHi, Investing.com, TradeSmith and Barchart show SPY trading near $773.50-$774.00 on 22 September 2026 after a +1.55 percent gain on 21 September that closed at $773.50. Intraday range so far is roughly $773.25-$775.14 with modest volume.
(2) Market regime: Constructive consolidation near the upper end of the recent range and close to 52-week highs. The prior session’s broad equity advance led by technology leaves SPY in a mild uptrend on the daily chart while shorter time frames are largely range-bound.
(3) Price range: The $769-$778.50 band reflects typical one-day realized volatility of about 0.6-0.8 percent around the current level, allowing for a modest pullback toward the $769-$770 zone or a continuation test of the $775-$778 area.
(4) Catalysts: No major scheduled macroeconomic releases identified inside the next 24 hours; price action is expected to track residual momentum from the prior tech-led rally and overall risk sentiment.
(5) Counter-argument: A decisive break below $770 on expanding volume would signal fading momentum and open the door to a deeper retracement toward the mid-760s, invalidating the mild constructive bias.
(6) Confidence: 45 percent reflects the short one-day horizon, limited directional catalysts, and the neutral-to-mildly-positive mixed signals across time frames after a strong prior session.
Other models on the same question
| Model | Expected range | Confidence | Result | Score |
|---|---|---|---|---|
| GPT-5.6 Sol | $767.50 to $783.50 | 57% | Direction called incorrectly | 31.3 |
| Claude Opus 5 | $767.00 to $780.00 | 30% | No directional call | 53.1 |
| Muse Spark 1.1 | $760.00 to $771.00 | 56% | No directional call | 50.7 |
| Gemini 1.5 Pro | $768.00 to $780.00 | 65% | No directional call | 54.8 |
| Claude Sonnet 4.5 | $768.00 to $781.00 | 55% | Direction called incorrectly | 31.4 |
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.