SPY 1-day forecast by DeepSeek V3

DeepSeek V3's 1-day forecast for SPY, made 2026-09-18: expected range $758.50 to $767.50 at 62% confidence. Settled at $769.17: direction called correctly, score 79.4.

AssetSPY
ModelDeepSeek V3
Recorded byForecastnest
Forecast made
Horizon1-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$759.25
Price the model reported$762.00
Expected range$758.50 to $767.50
Confidence62%
Prompt styleNo data
StatusSettled
Actual close$769.17
Traded range in the window$757.97 to $769.36
ResultDirection called correctly
Score79.4 of 100

The model's reasoning

(1) Market snapshot: I found SPY trading around $762.00 at the window start, based on a TradingView post showing SPY opening Friday at 762.00 and a Benzinga article published 9:10 AM ET stating SPY is currently trading around 761.50. A Barchart quote later showed 766.06 at 15:06 ET. The S&P 500 closed Thursday at 7,637.76, up 1.14%, according to the Associated Press and Yonhap.

(2) Market regime: The market is in a short-term relief rally after the Fed's 25bp rate hike to 3.75-4.00%, which was widely expected. Thursday's rebound was driven by falling Treasury yields and lower oil prices, with semiconductors leading after Nvidia's CEO said chip sales volumes could double next year. The VIX fell to 15.44 and front-month volatility collapsed. However, the rally is occurring inside a still-hostile backdrop: a hawkish Fed, unresolved energy-inflation concerns, and weak September seasonality. Today is quadruple witching, the first genuine one in six years, which can produce mechanical flows and sharp reversals.

(3) Price range: Using SPY options positioning from Alchemy Markets, the gamma flip is at 761.34, the put wall/max pain at 760, and the call wall at 765. The VWAP is 763.66. Support sits at 760-761.34, and resistance at 764-765, with a breakout above 765 opening the door to 767.50. On the downside, a break below 760 would expose 755.50 and then 749.50. I expect a one-day range of $758.50-$767.50, with volatility elevated due to expiration flows.

(4) Catalysts: Today is quadruple witching with roughly $6.2 trillion in US options expiring. This can create heavy volume, temporary price pinning around large strikes, and bursts of volatility. Industrial Production and Capacity Utilization data arrive at 9:15 AM ET, followed by the Leading Index at 10:00 AM ET. No other major scheduled catalysts are inside the window.

(5) Counter-argument: The strongest counter-argument is that the relief rally is mechanical rather than conviction-driven. The Fed remains hawkish, September seasonality is weak (roughly 3 out of 4 September triple-witching periods finished lower five trading days later), and expiration flows can reverse abruptly once the mechanical buying clears. A sustained break below 760 would invalidate the mild bullish short-term call and likely bring 755.50 into play.

(6) Confidence: I set confidence at 62% because the short-term direction is genuinely uncertain. Options positioning suggests dips are absorbed above 761.34, but quadruple witching introduces mechanical noise that can overwhelm fundamentals. The longer-term signals are bearish, but the one-day forecast is a coin flip with a slight upward bias from dealer hedging flows.

Other models on the same question

ModelExpected rangeConfidenceResultScore
GPT-5.6 Sol$754.00 to $767.0055%No directional call52.3
Claude Opus 5$753.10 to $769.1052%No directional call53.8
Muse Spark 1.1$754.00 to $770.0054%No directional call53.9
Grok 4.5$754.00 to $765.5038%No directional call50.1
Gemini 1.5 Pro$754.00 to $768.0065%No directional call53.6

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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