Event Gaps: Claude Sonnet 5.5's picks for 2026-10-27
Claude Sonnet 5.5 picked STX, FFIV, NXPI, GEV, OKE for a 1-day horizon. Intraday alpha vs SPY: -4.89%. Picks with positive alpha: 20%.
| Experiment | Event Gaps |
|---|---|
| Model | Claude Sonnet 5.5 |
| Prompt version | event-gap-v13 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-27 |
| Measured to | 2026-10-28 |
| Benchmark | SPY |
| Status | Settled |
| Intraday alpha vs SPY | -4.89% |
| Picks with positive alpha | 20% |
| Benchmark return | +0.52% |
The picks
| Rank | Symbol | Gap direction | Price change | Return in the called direction | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|---|---|
| 1 | STX | -3.57% | -3.57% | 52% | -4.09% | No | |
| 2 | FFIV | -18.57% | -18.57% | 50% | -19.09% | No | |
| 3 | NXPI | +0.47% | +0.47% | 48% | -0.05% | No | |
| 4 | GEV | -1.01% | +1.01% | 42% | +0.49% | Yes | |
| 5 | OKE | -1.20% | -1.20% | 40% | -1.72% | No |
The model's market view
Four of the five picks (STX, NXPI, FFIV, OKE) report after the close on 2026-10-27, so their earnings reactions fall inside the window. GEV reports before the open on 2026-10-28, also inside the window. Boeing, SoFi and other names already reported this morning, so I excluded them: their reactions are already realised. I could not verify live quotes, completed daily OHLCV or 20-day dollar volumes for any pick, so those fields are null and confidence is moderate to low. Directions rest mainly on beat-and-raise history, guidance versus consensus, and valuation, not on price or volume confirmation.
Why each pick
STX
CATALYST (scheduled, confirmed): Seagate reports fiscal Q1 2027 results after the US close on 2026-10-27, with a call at 5:00 PM ET, per the company's own announcement. OBSERVED FACTS: management guided Q1 revenue to $4.1B plus or minus $0.1B and non-GAAP EPS to $7.30 plus or minus $0.20. One aggregator shows a consensus EPS of about $7.11, below the guidance midpoint. STX beat consensus in each of its last 7 quarters, and the July report was followed by a roughly 10% rise. An options-implied move of about 11% was reported by a third-party page. INFERENCE: if a beat-and-raise pattern repeats, the report is a fundamental change in expectations (HAMR ramp, margins near 50%), not just sentiment. Anticipation into the print is likely to keep the stock elevated during the session. COUNTER-EVIDENCE: the stock has had a very large run, with a 52-week range of about 138 to 1145 as of July. A third-party daily recap shows STX fell about 10% on 2026-10-02 alongside WDC, so expectations are high and a sell-the-news reaction is plausible. INVALIDATION: a revenue or EPS result below the stated guidance range, or weak fiscal Q2 guidance, would invalidate the thesis. DATA GAPS: reference_price, latest_price, quote_time and the pre-event price are null because I could not verify a current dated quote. Observed event-to-quote reaction: null. Partial-session open, high, low and cumulative volume: null, so relative intraday volume cannot be established. Completed daily OHLCV (daily_5d), return_5d_pct, high_20d, low_20d and avg_volume_20d: null, not verified. Market cap shown is a stale figure of about $173.8B from a 2026-07-29 quote page. Liquidity and price floors are very likely met, but the 20-day dollar volume is not verified. Source for history: not available. US Eastern session convention applies. Expected move is from now to the end of the window and includes the after-hours reaction.
FFIV
CATALYST (scheduled, confirmed): F5 reports fiscal Q4 and full-year 2026 results after the close on 2026-10-27, with a webcast at 4:30 PM ET, per the company's press release. OBSERVED FACTS: F5 guided Q4 non-GAAP EPS to $4.14-$4.26 and revenue to $870-$890M. Reported EPS has beaten estimates by about 19% to 34% over the last four reported quarters, and F5 raised its FY2026 revenue-growth outlook three times this year. The consensus EPS is about $4.24-$4.26, at the top of guidance. A third-party page lists an options-implied move of about 12%. INFERENCE: the repeated pattern of beating the high end of guidance supports a positive skew. However, consensus already sits at the top of the range, so the beat must be large. Anticipation of AI-driven systems demand may support the stock into the print. COUNTER-EVIDENCE: a stale July quote page showed the stock down about 4% after the prior quarter's report despite a large beat, so good results do not guarantee a rise. INVALIDATION: Q4 EPS below $4.14 or revenue below $870M, or FY2027 guidance below consensus, would invalidate the thesis. DATA GAPS: reference_price, latest_price, quote_time and the pre-event price are null because no dated live quote was verified. Observed event-to-quote reaction: null. Partial-session data: null. Completed daily OHLCV (daily_5d), return_5d_pct, high_20d, low_20d and avg_volume_20d: null, not verified. Market cap shown is a stale figure of about $23.0B from 2026-07-28. The $5, $1B and $20M floors are very likely met, but the 20-day dollar volume is not verified. US Eastern session convention applies.
NXPI
CATALYST (scheduled, confirmed): NXP reports Q3 2026 results after the close on 2026-10-27, with a call at 4:30 PM ET, per the company's 2026-10-06 announcement. OBSERVED FACTS: in July, NXP guided Q3 revenue to $3.65-$3.85B and non-GAAP EPS to $3.89-$4.32, with a midpoint above the consensus at that time. The stock fell after the Q2 report despite a beat. An earnings-page quote of about $235.22, with no reliable timestamp, sits well below the July 50-day average of about $294.70, so the stock has de-rated into the print. A third-party page lists an options-implied move of about 12.5%. INFERENCE: a depressed pre-event price plus guidance that was above consensus raises the odds of a relief move if automotive, industrial and IoT growth holds. This is partly a sentiment and positioning argument, not just a fundamental one. COUNTER-EVIDENCE: Bernstein flagged uncertain Chinese automotive demand and limited AI data-center exposure. An oversold decline alone does not establish a rebound. INVALIDATION: Q4 guidance below consensus or an automotive revenue decline would invalidate the thesis. DATA GAPS: reference_price and latest_price are null because the $235.22 figure has no verifiable timestamp. Pre-event price, observed reaction and partial-session data: null. Completed daily OHLCV, return_5d_pct, high_20d, low_20d and avg_volume_20d: null, not verified. Market cap shown is a stale figure of about $61.8B from 2026-07-29. The floors are very likely met, but the 20-day dollar volume is not verified. US Eastern session convention applies.
GEV
CATALYST (scheduled): GE Vernova's Q3 2026 results are listed for before the open on 2026-10-28 by two earnings-calendar sources. One of them says the company has announced the date. I did not find the company press release, and the time of day is inferred from the before-open label, so the release time is unverified. OBSERVED FACTS: the consensus is EPS of about $4.03-$4.07 on revenue of about $12.0B. In July GEV reported EPS of $2.47 versus a $3.17 consensus, a roughly 22% miss. Third-party commentary pointed to recent downgrades and a premium valuation with a forward P/E above 60. INFERENCE: the Q3 EPS consensus requires a large step up from the July actual, and the premium multiple leaves little room for a miss. This is a mixed fundamental and sentiment call. Anticipation could weigh on the stock if investors fear another EPS miss. COUNTER-EVIDENCE: GEV has had strong prior reactions on orders and backlog, including past jumps of about 15% after reports, and structural power-demand themes remain supportive. A beat or raised guidance would likely send the stock higher, so this short is low-conviction. INVALIDATION: EPS and orders ahead of consensus, or raised 2026 guidance, on 2026-10-28 would invalidate the thesis. DATA GAPS: reference_price, latest_price and quote_time are null because I could not verify a current dated quote. Pre-event price, observed reaction and partial-session data: null. Completed daily OHLCV, return_5d_pct, high_20d, low_20d and avg_volume_20d: null, not verified. Market cap of about $263.3B is from an earnings-calendar page dated for 2026-10-28, with no verified timestamp. The 20-day dollar volume is not verified, though the floors are very likely met. US Eastern session convention applies.
OKE
CATALYST (scheduled, confirmed): ONEOK will release Q3 2026 earnings after the close on 2026-10-27, with a conference call on 2026-10-28 at 11 AM ET, per the company's 2026-10-05 release. OBSERVED FACTS: the consensus EPS is about $1.46 on revenue of about $10.3B-$11.8B, depending on the source. ONEOK beat in 6 of its last 8 quarters, including a roughly 10% EPS beat and a guidance raise in August. A third-party page lists an options-implied move of about 7%. An earnings-page quote of about $89.80, with no reliable timestamp, sits below the August post-earnings average price of about $92.16. INFERENCE: a steady beat record and a below-average price give a modest positive skew, but midstream earnings are usually fee-based and move the stock less than tech earnings. This is a low-conviction call, and it also diversifies the batch away from semiconductor exposure. COUNTER-EVIDENCE: the year-ago EPS was $1.49 versus a $1.46 estimate, so there is no growth cushion. The company missed estimates in some recent quarters, and natural gas liquids price volatility is a risk. INVALIDATION: an EPS miss, or 2027 capital-spending guidance that disappoints on the 2026-10-28 call. DATA GAPS: reference_price, latest_price and quote_time are null because the $89.80 figure has no verifiable timestamp. Market cap and 20-day dollar volume are null because I could not verify either figure. The floors are very likely met for an S&P 500 midstream company, but this is inference. Completed daily OHLCV, return_5d_pct, high_20d, low_20d, avg_volume_20d, pre-event price, observed reaction and partial-session data: null. US Eastern session convention applies.
Other models on the same run
| Model | Picks | Intraday alpha vs SPY | Picks with positive alpha |
|---|---|---|---|
| Perplexity | V, HOOD, STX, RCL, GLW | +0.03% | 60% |
| Grok 4.7 | HOOD, STX, SOFI, ENPH, NXPI | +3.79% | 60% |
| Muse Spark 1.1 | BA, PYPL, KO, V, HOOD | +1.13% | 40% |
| GPT-6 | ENPH, STX, HOOD, NXPI, V | +3.16% | 60% |
| DeepSeek | MSFT, GOOGL, KLAC, STX, SOFI | +0.75% | 60% |
Written up on ForecastNest Insights: Event Gaps: Claude Sonnet 5.5's picks for 2026-10-27.
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