SPY 7-day forecast by GPT-5.6 Luna

GPT-5.6 Luna's 7-day forecast for SPY, made 2026-08-25: expected range $744.00 to $782.00 at 64% confidence. Settled at $763.76: direction called correctly, score 81.1.

AssetSPY
ModelGPT-5.6 Luna
Recorded byForecastnest
Forecast made
Horizon7-day (Existing Mode 1 horizon rules apply; the stored expiry is authoritative.)
Window closes
Price when asked$764.70
Expected range$744.00 to $782.00
Confidence64%
Prompt styleNo data
StatusSettled
Actual close$763.76
Traded range in the window$761.17 to $775.30
ResultDirection called correctly
Score81.1 of 100

The model's reasoning

I retrieved current information dated August 25, 2026, so data_access is live. The supplied $765.08 baseline is close to the latest verified regular-session price: StatMuse reports SPY closed August 24 at $763.47, after trading between $762.08 and $765.22; August 21 closed at $765.72. ([StatMuse][1]) On August 25, U.S. equity futures turned higher, with Reuters reporting a broad technology rebound, lower Treasury yields, and gains in the S&P 500 as investors positioned for Nvidia's earnings and upcoming inflation data. ([Reuters][2]) The current regime therefore looks like a bullish long-term trend undergoing a short-term consolidation/correction rather than a confirmed breakdown. The S&P 500 had just fallen 1.4% for the prior week, ending a three-week winning streak, and then declined another 0.28% on August 24, according to Advisor Perspectives and TradingView/Barchart. ([Advisor Perspectives][3]) However, the index remains up about 11.8% year-to-date, according to AP's August 24 market summary, and 21 S&P 500 constituents were making new 52-week highs on August 25, suggesting that breadth has not collapsed. ([AP News][4]) For the seven-day horizon I give the highest weight to the recent SPY price structure and the broader equity regime, while treating technology/AI leadership and rates as the major cross-market inputs. The immediate price structure shows support around $762-$764, with the August 24 low at $762.08 and the August 21 close at $765.72; the recent August 17 high of $776.78 provides a natural first upside reference, while $778-$780 represents the upper portion of the recent trading range. ([StatMuse][1]) I therefore expect a modest upward bias but not a breakout call. The forecast range of $744-$782 is intentionally asymmetric around the $765.08 baseline: the downside is wider because the market has just experienced a volatility increase and several major binary catalysts are approaching, while the upside is constrained by the recent $776-$779 resistance zone. The lower bound around $744 also corresponds approximately to the late-July/early-August consolidation area visible in the recent SPY history, rather than assuming an unrestricted crash. ([StatMuse][1]) The dominant catalysts inside the seven-day window are unusually important. NVIDIA is scheduled to report fiscal Q2 results on Wednesday, August 26 at 5 p.m. ET, according to NVIDIA's official newsroom; because Nvidia is a major S&P 500 constituent and an important driver of AI-related sentiment, its results and guidance could materially move SPY through the technology sector. ([NVIDIA Newsroom][5]) The Bureau of Economic Analysis is also scheduled to release July Personal Income and Outlays, including the PCE inflation data, on August 26 at 8:30 a.m. EDT, together with the second estimate of Q2 GDP and corporate profits. ([Bureau of Economic Analysis][6]) Finally, Federal Reserve Chair Kevin Warsh is scheduled to deliver keynote remarks at the 2026 Jackson Hole Economic Policy Symposium on August 28, according to the Federal Reserve calendar. ([Federal Reserve][7]) These catalysts make the latter half of the forecast window substantially more volatile than the first half. The strongest counter-argument is that the market's recent weakness reflects a deeper valuation/rates correction rather than a temporary pause. Reuters notes that rising bond-market volatility and elevated yields have been pressuring equities, while the Nvidia result and Jackson Hole event are explicitly viewed as tests of the assumptions supporting the equity rally. ([Reuters][8]) A hotter-than-expected PCE reading, a hawkish Warsh message, or disappointing Nvidia guidance could push SPY decisively below $762 and make the $744-$750 region more likely. Conversely, a strong Nvidia report combined with benign inflation and lower yields would invalidate the cautious range and make a move toward or above $780 more probable. Confidence is 64% because the underlying trend and current breadth remain constructive, and Tuesday's live market tone has improved, but the seven-day window contains three unusually important catalysts whose outcomes cannot be inferred reliably in advance. I therefore favor MILD BULLISH rather than BULLISH: the evidence supports continuation of the broader uptrend and a rebound from the recent consolidation, but the balance of outcomes is too event-dependent to justify high conviction.

Other models on the same question

ModelExpected rangeConfidenceResultScore
DeepSeek V3$745.00 to $775.0052%Direction called correctly81.4
Gemini 1.5 Pro$748.00 to $780.0055%No directional call53.0
Grok 4.5$748.00 to $782.0030%No directional call51.8

How this forecast is measured

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