SPY 1-day forecast by Grok 4.5
Grok 4.5's 1-day forecast for SPY, made 2026-09-09: expected range $758.00 to $774.00 at 38% confidence. Settled at $762.39: no directional call, score 53.2.
| 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 | $765.99 |
| Price the model reported | $766.00 |
| Expected range | $758.00 to $774.00 |
| Confidence | 38% |
| Prompt style | No data |
| Status | Settled |
| Actual close | $762.39 |
| Traded range in the window | $760.94 to $764.47 |
| Result | No directional call |
| Score | 53.2 of 100 |
The model's reasoning
(1) What you found, and where: Live market data from MarketWatch, FT, Investing.com, TECHi and Twelve Data show SPY closing at $765.96 on 8 September 2026 (down 0.55 percent on the day) with an after-hours print near $765.40. The session range was $765.14-$769.70. Recent closes have oscillated between roughly $762 and $773.
(2) The current market regime as you read it: The S&P 500 proxy is consolidating after a mild early-September pullback. Macro conditions remain shaped by elevated rate-hike probabilities following strong labor data and sticky inflation readings. Equity positioning is mixed, with defensive sectors relatively firm and rate-sensitive areas under pressure. Realized volatility is moderate near 13 percent annualized.
(3) Price range justification, with the levels and volatility you are using: Anchored near $766, the one-day range of $758-$774 reflects typical recent daily ranges of 0.5-1.0 percent plus a modest buffer for overnight gaps. Near-term support sits around the $761-$763 zone; resistance is clustered near the $770-$774 area that capped the prior bounce.
(4) Scheduled or likely catalysts inside the window: No major U.S. economic releases or FOMC events fall inside the exact 24-hour window starting 02:18 UTC on 9 September. The nearest data points (PPI on 10 September, CPI on 11 September) and the mid-month FOMC sit outside the horizon, leaving the session driven mainly by residual positioning and any overnight equity or rates flows.
(5) The strongest counter-argument, and what would invalidate your call: A sudden softening in rate-hike odds or a broad risk-on open could push SPY back toward $772-$774 and invalidate the mild downside bias. Conversely, a further rise in yields or risk-off move would favor the lower end of the range. The one-day call remains neutral because neither catalyst is confirmed inside the window.
(6) Why your confidence is the number it is: Confidence is modest at 38 percent because a single equity-trading day is dominated by noise and liquidity rather than structural drivers. Live price data are consistent across sources, yet the absence of a decisive catalyst and mixed multi-timeframe signals keep conviction limited.
Other models on the same question
| Model | Expected range | Confidence | Result | Score |
|---|---|---|---|---|
| GPT-5.6 Sol | $754.00 to $773.00 | 74% | Direction called correctly | 82.8 |
| Muse Spark 1.1 | $756.00 to $775.00 | 55% | No directional call | 53.7 |
| Gemini 1.5 Pro | $758.00 to $771.00 | 75% | Direction called correctly | 83.1 |
| DeepSeek V3 | $762.00 to $778.00 | 58% | No directional call | 54.1 |
| Kimi | $759.00 to $772.00 | 55% | No directional call | 54.2 |
| Claude Opus 5 | $754.00 to $773.50 | 44% | Direction called correctly | 80.0 |
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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