Event Gaps: Claude Sonnet 5.5's picks for 2026-10-28
Claude Sonnet 5.5 picked GOOGL, CMG, F, NOW, MSFT for a 1-day horizon. Intraday alpha vs SPY: +5.30%. Picks with positive alpha: 80%.
| Experiment | Event Gaps |
|---|---|
| Model | Claude Sonnet 5.5 |
| Prompt version | event-gap-v13 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-28 |
| Measured to | 2026-10-29 |
| Benchmark | SPY |
| Status | Settled |
| Intraday alpha vs SPY | +5.30% |
| Picks with positive alpha | 80% |
| Benchmark return | -0.16% |
The picks
| Rank | Symbol | Gap direction | Price change | Return in the called direction | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|---|---|
| 1 | GOOGL | -11.99% | -11.99% | 55% | -11.83% | No | |
| 2 | CMG | +6.95% | +6.95% | 52% | +7.12% | Yes | |
| 3 | F | +4.09% | +4.09% | 52% | +4.25% | Yes | |
| 4 | NOW | -25.87% | +25.87% | 48% | +26.04% | Yes | |
| 5 | MSFT | -0.75% | +0.75% | 45% | +0.91% | Yes |
The model's market view
Big Tech earnings (Alphabet, Microsoft) and the 2 p.m. ET Fed decision land inside the window, with semiconductors rallying on SK Hynix results. Options imply roughly 5-10% moves for the after-close reporters, and direction is close to a coin flip. I lean toward names that sold off into their prints (GOOGL, CMG, F) and fade names that ran up into theirs (NOW, MSFT). All five calls carry low confidence. Daily bars and the 20-session range come from the stockanalysis.com history pages in US Eastern session convention, with split-adjusted OHLC.
Why each pick
GOOGL
Thesis: Alphabet reports Q3 after the close on 2026-10-28 (officially scheduled; call 4:30 p.m. ET). The stock de-rated ahead of the print, and a Google Cloud/AI-chip demand narrative (report that OpenAI plans to buy Google AI chips) is supportive. I forecast a modest net gain over the window. Facts: the report is confirmed and options imply about +/-5.99% (TipRanks). Inference: the weak pre-print path lowers the bar. Sentiment, not fundamentals, drove the pre-print slide; the OpenAI chip report is a sentiment and demand-expectation change, not a reported result. Strongest counter-evidence: part of the rebound is already in today's price (+1.1% on the OpenAI report), capex or AI-spend fears could dominate, and the Fed decision at 2 p.m. ET adds macro risk. Price/volume: 5-day return is negative with elevated volume on down days, so there is no confirmed reversal; the last close of 320.58 is just above the 20-session low of 316.60. Invalidation: weak cloud growth or a capex surprise after the close, or a close below 316.60.
Completed daily OHLCV (US Eastern sessions, split-adjusted, oldest to newest):
2026-10-21 O336.98 H337.27 L330.38 C334.76 V29165541
2026-10-22 O330.46 H331.43 L322.00 C324.22 V27748122
2026-10-23 O321.15 H324.53 L320.18 C320.21 V17569640
2026-10-26 O320.89 H321.48 L316.60 C316.80 V23991837
2026-10-27 O317.00 H323.88 L316.86 C320.58 V28633058
return_5d_pct=-5.79 (close 2026-10-20 340.28). high_20d=359.40 low_20d=316.60 avg_volume_20d=24298585 (sessions 2026-09-30 to 2026-10-27). History source: https://stockanalysis.com/stocks/googl/history/
Intraday: latest_price=324.28, quote_time=2026-10-28T14:46:00Z (10:46 AM EDT), source https://stockanalysis.com/stocks/googl/history/, labelled real-time regular-session by the source. The first two quote fields are not a prior close. PARTIAL SESSION as of 2026-10-28T14:46:00Z: open 323.77, high_so_far 326.41, low_so_far 323.17, cumulative_volume 8775113. Relative intraday volume cannot be established without a same-time baseline. Pre-event price path: down about 8% from the 2026-10-14 high zone to 316.60 on 2026-10-26. Observed reaction: not applicable, because the event has not occurred; the move from the 2026-10-27 close to the quote is +1.2%, driven by a non-earnings report, so I treat it as anticipation. Expected move after the current quote: +3% by the end of the window. Verified pre-event price at a stated timestamp: null. avg_dollar_volume_20d_usd is approximated as avg_volume_20d times the mean 20-session close (about 337); market_cap_usd is from the stockanalysis.com biggest-companies list (about 3.96T) at the time of the lookup.
CMG
Thesis: Chipotle reports Q3 after the close on 2026-10-28 (scheduled per TipRanks; the exact release time was not verified). The stock fell into the print on analyst downgrades and price-target cuts, and traders are positioned heavily against it, so expectations are low. I forecast a modest bounce if results or guidance are merely not worse than feared. Facts: options imply about +/-7.51%; TD Cowen downgraded to Hold, Mizuho cut its target to $37 from $43, and Deutsche Bank cut its target to $45 from $51 (headlines on stockanalysis.com). Inference: positioning and low expectations raise the chance of a relief move. Strongest counter-evidence: persistent downtrend, a 5-day return of -5.63%, and a close of 27.98 near the 20-session low of 27.31. A comparable-sales or guidance cut could drive a sharp drop, and short interest does not guarantee a squeeze. Volume has been elevated on selling days (2026-10-21 and 2026-10-22 above 26M shares), which supports continuation lower rather than reversal until the print. Invalidation: a comparable-sales decline or lowered outlook after the close, or a close below 27.31.
Completed daily OHLCV (US Eastern sessions, split-adjusted, oldest to newest):
2026-10-21 O29.03 H29.10 L27.87 C28.12 V27919258
2026-10-22 O28.09 H28.47 L27.82 C28.14 V26862953
2026-10-23 O27.93 H28.04 L27.31 C27.52 V18706062
2026-10-26 O27.74 H28.64 L27.66 C28.41 V21911667
2026-10-27 O28.39 H28.49 L27.89 C27.98 V18203635
return_5d_pct=-5.63 (close 2026-10-20 29.65). high_20d=33.40 low_20d=27.31 avg_volume_20d=22264881 (sessions 2026-09-30 to 2026-10-27). History source: https://stockanalysis.com/stocks/cmg/history/
Intraday: latest_price=28.79, quote_time=2026-10-28T14:46:00Z (10:46 AM EDT), source https://stockanalysis.com/stocks/cmg/history/, labelled real-time regular-session by the source. PARTIAL SESSION as of 2026-10-28T14:46:00Z: open 28.12, high_so_far 28.87, low_so_far 28.07, cumulative_volume 5804490. Relative intraday volume cannot be established. Pre-event path: from 31.95 on 2026-09-30 to 27.98 on 2026-10-27 (about -12%). Observed reaction: not applicable, since the event is upcoming; today is +2.9% from the prior close, so some anticipation or short covering appears already in the price. Expected move after the current quote: +4% by the end of the window. Verified pre-event price: null. avg_dollar_volume_20d_usd is approximated as avg_volume_20d times the mean 20-session close (about 30); market_cap_usd is 36.43B from https://stockanalysis.com/stocks/cmg/market-cap/.
F
Thesis: Ford reports Q3 at 4:05 p.m. ET on 2026-10-28 (officially announced by the company). The stock has fallen about 22% since its last report (close 14.96 on 2026-07-28 to 11.71 on 2026-10-27), so I expect a modest relief move if results and guidance hold. Facts: Ford beat EPS in 7 of the last 8 quarters (therighttrader.com), last quarter's EPS was 0.42 against a 0.33 consensus, and Q3 consensus is about 0.39 EPS (7 analysts). Options imply about +/-6.4% (TipRanks). Inference: the beat history and de-rated price raise the odds of a positive reaction. Strongest counter-evidence: a persistent downtrend (5-day return -3.62%), repeated pressure headlines, and weak recent Q3 expectations for margins and tariffs. Price/volume: daily volume is heavy (36-44M) with no reversal signal; the close of 11.71 is near the 20-session low of 11.44. Invalidation: weak guidance or a cut to the 2026 outlook after the close, or a close below 11.44.
Completed daily OHLCV (US Eastern sessions, split-adjusted, oldest to newest):
2026-10-21 O12.14 H12.18 L11.84 C11.90 V44408807
2026-10-22 O11.80 H12.05 L11.79 C11.94 V38053961
2026-10-23 O11.83 H11.84 L11.44 C11.60 V44146929
2026-10-26 O11.62 H11.71 L11.53 C11.58 V35076234
2026-10-27 O11.67 H11.79 L11.58 C11.71 V43214748
return_5d_pct=-3.62 (close 2026-10-20 12.15). high_20d=12.78 low_20d=11.44 avg_volume_20d=39871415 (sessions 2026-09-30 to 2026-10-27). History source: https://stockanalysis.com/stocks/f/history/
Intraday: latest_price=11.72, quote_time=2026-10-28T14:46:00Z (10:46 AM EDT), source https://stockanalysis.com/stocks/f/history/, labelled real-time regular-session by the source. PARTIAL SESSION as of 2026-10-28T14:46:00Z: open 11.84, high_so_far 11.84, low_so_far 11.71, cumulative_volume 7566365. Relative intraday volume cannot be established. Pre-event path: steady decline from 12.06 on 2026-09-30. Observed reaction: not applicable, because the event is upcoming; the quote is +0.1% from the prior close. Expected move after the current quote: +3.5% by the end of the window. Verified pre-event price: null. avg_dollar_volume_20d_usd is approximated as avg_volume_20d times the mean 20-session close (about 12.1); market_cap_usd is 46.73B from https://stockanalysis.com/stocks/f/market-cap/.
NOW
Thesis: ServiceNow reports Q3 after the close on 2026-10-28 (scheduled per TipRanks; the exact release time was not verified). The stock rallied about 15% from 134.01 on 2026-09-30 to 154.78 on 2026-10-27, and several brokers raised price targets in the past week, so the bar is higher into the print. I forecast a net decline if the reaction is merely in line. Facts: options imply about +/-10.36%; BofA raised its target to $180 from $150, Guggenheim to $175 from $125, and Truist to $180 from $130 (headlines on stockanalysis.com); the company previously guided Q3 subscription revenue to about 3.975-3.98B and cRPO growth of about 20%. Inference: the run-up and target raises mean a clean beat may already be priced in. Strongest counter-evidence: ServiceNow beat EPS by 18-38% in each of the last four quarters and beat revenue every time, and AI partnership news (Google Cloud, Nvidia) is supportive. Price/volume: the 5-day return is +3.50%, the last close of 154.78 sits just below the 20-session high of 159.50, and daily volume (about 13-17M) runs above the 20-day average, which is consistent with either continuation or exhaustion. Invalidation: an upside cRPO or guidance raise that lifts the stock through 159.50.
Completed daily OHLCV (US Eastern sessions, split-adjusted, oldest to newest):
2026-10-21 O149.64 H153.98 L148.40 C153.12 V13065219
2026-10-22 O154.25 H157.60 L153.57 C157.00 V17406898
2026-10-23 O156.38 H159.50 L153.72 C158.96 V11100759
2026-10-26 O158.55 H159.30 L155.00 C158.18 V14739149
2026-10-27 O156.10 H157.13 L152.88 C154.78 V13481100
return_5d_pct=3.50 (close 2026-10-20 149.54). high_20d=159.50 low_20d=128.85 avg_volume_20d=11422749 (sessions 2026-09-30 to 2026-10-27). History source: https://stockanalysis.com/stocks/now/history/
Intraday: latest_price=153.00, quote_time=2026-10-28T14:45:00Z (10:45 AM EDT), source https://stockanalysis.com/stocks/now/history/, labelled real-time regular-session by the source. PARTIAL SESSION as of 2026-10-28T14:45:00Z: open 151.60, high_so_far 155.15, low_so_far 151.13, cumulative_volume 5027913. Relative intraday volume cannot be established. Pre-event path: up about 15% from 2026-09-30 to the 2026-10-26 peak area; the last two sessions are down. Observed reaction: not applicable, because the event is upcoming; the quote is -1.2% from the prior close. Expected move after the current quote: -5% by the end of the window. Verified pre-event price: null. avg_dollar_volume_20d_usd is approximated as avg_volume_20d times the mean 20-session close (about 145); market_cap_usd is 158.18B from https://stockanalysis.com/stocks/now/market-cap/.
MSFT
Thesis: Microsoft reports fiscal Q1 2027 after the close on 2026-10-28 (confirmed by the company; webcast 5:30 p.m. ET). The stock has risen about 9% since mid-August and trades near the top of its 20-session range, with investor attention on Azure growth, AI spending and an employee buyout program. I lean slightly toward a decline if the reaction is muted, which is an inference with low confidence. Facts: options imply about +/-5.09%; consensus is about 4.82 EPS on 92.46B revenue (financecalendar.com, citing ChartMill); the Fed decision is at 2 p.m. ET today. Strongest counter-evidence: Microsoft has repeatedly beaten estimates, and stronger Azure growth or AI demand could lift the stock well above the current quote. The 5-day return is about -0.10% with no clear trend, and volume is below the 20-day average, so there is no confirmed continuation or exhaustion signal. Invalidation: Azure acceleration or raised guidance that pushes the stock through the 20-session high of 551.15, or a close above that level.
Completed daily OHLCV (US Eastern sessions, split-adjusted, oldest to newest):
2026-10-21 O529.44 H533.28 L525.02 C532.95 V13940102
2026-10-22 O533.14 H533.60 L520.30 C521.08 V21266610
2026-10-23 O517.75 H525.77 L515.70 C524.51 V13681067
2026-10-26 O527.40 H533.25 L521.69 C532.60 V19021036
2026-10-27 O532.35 H534.70 L528.33 C531.33 V19532321
return_5d_pct=-0.10 (close 2026-10-20 531.87). high_20d=551.15 low_20d=510.31 avg_volume_20d=20075467 (sessions 2026-09-30 to 2026-10-27). History source: https://stockanalysis.com/stocks/msft/history/
Intraday: latest_price=529.12, quote_time=2026-10-28T14:47:00Z (10:47 AM EDT), source https://stockanalysis.com/stocks/msft/history/, labelled real-time regular-session by the source. PARTIAL SESSION as of 2026-10-28T14:47:00Z: open 531.82, high_so_far 534.57, low_so_far 528.08, cumulative_volume 3885377. Relative intraday volume cannot be established. Pre-event path: up from 512.90 on 2026-09-30 to 531.33 on 2026-10-27. Observed reaction: not applicable, because the event is upcoming; the quote is -0.4% from the prior close. Expected move after the current quote: -2.5% by the end of the window. Verified pre-event price: null. avg_dollar_volume_20d_usd is approximated as avg_volume_20d times the mean 20-session close (about 524); market_cap_usd is from the stockanalysis.com biggest-companies list (about 3.93T) at the time of the lookup.
Other models on the same run
| Model | Picks | Intraday alpha vs SPY | Picks with positive alpha |
|---|---|---|---|
| GPT-6 | GOOGL, NOW, CMG, VRT, MSFT | +0.35% | 20% |
| Muse Spark 1.1 | GOOGL, MSFT, NOW, CMG, F | -9.77% | 0% |
| Gemini 3.6 Flash High | MSFT, GOOGL, META, AAPL, AMZN | -2.26% | 40% |
| Perplexity | MSFT, GOOGL, AMZN, CAT, LLY | -5.69% | 0% |
| DeepSeek | WEN, ENPH, MSFT, GOOGL, VRT | -1.09% | 60% |
Written up on ForecastNest Insights: Event Gaps: Claude Sonnet 5.5's picks for 2026-10-28.
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