Event Gaps: Grok 4.5's picks for 2026-10-21
Grok 4.5 picked TSLA, META, LRCX, TXN, IBM for a 1-day horizon. Intraday alpha vs SPY: -3.06%. Picks with positive alpha: 40%.
| Experiment | Event Gaps |
|---|---|
| Model | Grok 4.5 |
| Prompt version | event-gap-v13 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-21 |
| Measured to | 2026-10-22 |
| Benchmark | SPY |
| Status | Settled |
| Intraday alpha vs SPY | -3.06% |
| Picks with positive alpha | 40% |
| Benchmark return | -1.10% |
The picks
| Rank | Symbol | Gap direction | Price change | Return in the called direction | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|---|---|
| 1 | TSLA | -0.11% | -0.11% | 62% | +0.99% | Yes | |
| 2 | META | -8.33% | -8.33% | 58% | -7.23% | No | |
| 3 | LRCX | -11.92% | -11.92% | 55% | -10.82% | No | |
| 4 | TXN | -1.45% | -1.45% | 52% | -0.35% | No | |
| 5 | IBM | +1.00% | +1.00% | 50% | +2.10% | Yes |
The model's market view
US equities trade mixed mid-session on October 21 with AI and space-related names elevated after SpaceX results while investors position ahead of major after-close reports from Meta, Tesla, Lam Research, Texas Instruments and IBM. The one-session window captures the immediate post-earnings reaction on October 22, where guidance and AI-related commentary are likely to drive sharp directional moves in large-cap technology and semiconductor equipment names. Liquidity remains ample and the price, market-cap and dollar-volume floors are comfortably cleared for the selected names.
Why each pick
TSLA
Tesla reports Q3 results after the close on 21 October. Consensus sits near $0.44 EPS and roughly flat revenue. The stock has already risen approximately 3% intraday on SpaceX synergy commentary and special-committee merger discussion, yet the remaining window is still open to the post-print reaction. Historical average absolute move around earnings is near 9%. Stronger-than-expected robotaxi or energy storage commentary would support continuation higher; weak vehicle deliveries or margin pressure would reverse the pre-print strength. Strongest counter-evidence is the elevated valuation and recent delivery volatility. Invalidation would be a clear miss on both EPS and forward guidance that drives the stock below the pre-print $373 area on elevated volume.
latest_price: 385.93
quote_time: 2026-10-21T14:32:00Z
source: https://tradesmith.com/stockdata/TSLA:NASDAQ/historical-data
quote_type: delayed regular-session
PARTIAL SESSION open ~381 high_so_far ~388.8 low_so_far ~380.5 cumulative_volume partial ~11-15M as of mid-morning; relative volume cannot be established versus full-day average.
Completed daily bars (oldest to newest, regular sessions through 20 Oct):
2026-10-14 O371.16 H371.39 L363.82 C367.16 V31001400
2026-10-15 O360.57 H363.75 L355.23 C362.44 V26728300
2026-10-16 O369.15 H370.50 L349.33 C354.72 V62067300
2026-10-19 O357.50 H369.58 L354.47 C368.06 V38817900
2026-10-20 O370.28 H377.59 L363.64 C373.71 V32326900
return_5d_pct null (six closes not fully verified in single source)
high_20d ~388.56 low_20d ~345.88 avg_volume_20d ~35M (approximate from available series)
history_source: https://www.techi.com/quote/TSLA/historical/ (US Eastern sessions)
META
Meta reports Q3 after the close. Consensus revenue growth near 24% and EPS around $6.00. The stock has pulled back roughly 9% over the prior week, leaving room for a relief move if AI spending returns or Reality Labs losses moderate. Options imply ~7% expected move. Strongest counter-evidence is the recent multiple compression and high absolute AI capex. Invalidation would be guidance that raises 2027 opex without corresponding revenue acceleration, pushing the stock below the recent $680 support on heavy volume.
latest_price: 694.25 (prior close; intraday quotes near 700-710 in early trade)
quote_time: 2026-10-20T20:00:00Z
source: https://stockanalysis.com/stocks/meta/
quote_type: prior regular-session close; intraday delayed quotes available but freshest verified close used
PARTIAL SESSION not fully quantified in sources.
Completed daily bars limited; return_5d_pct null; high_20d ~779 low_20d ~520 avg_volume_20d ~19.6M
history_source: https://stockanalysis.com/stocks/meta/statistics/
LRCX
Lam Research reports Q1 FY2027 after the close. Semiconductor equipment names have sold off ~12% in the prior week on broader AI digestion. A beat-and-raise on wafer-fab equipment demand would reverse the recent weakness. Average historical move ~6-8%. Strongest counter-evidence is the elevated valuation relative to prior cycle peaks and softening foundry commentary. Invalidation would be a cut to calendar 2027 guidance that drives the stock below $250.
latest_price: 265.77
quote_time: 2026-10-21T13:44:00Z
source: https://tradesmith.com/stockdata/LRCX:NASDAQ/statistics
quote_type: delayed regular-session
Completed daily bars partial; return_5d_pct null; high_20d ~438 low_20d ~135 avg_volume_20d ~8.3M
history_source: https://stockanalysis.com/stocks/lrcx/statistics/
TXN
Texas Instruments reports after the close. Analog and embedded demand has been recovering; a confirmation of sequential growth and stable gross margin would support the recent rebound from the $270 area. Historical moves average mid-single digits. Strongest counter-evidence is the still-elevated inventory levels across the channel. Invalidation would be a sequential revenue decline or margin miss that returns the stock below the 50-day average near $272.
latest_price: 277.78
quote_time: 2026-10-20T20:00:00Z
source: https://stockanalysis.com/stocks/txn/
quote_type: prior close; early session quotes near 278-280
Completed daily bars limited; return_5d_pct null; high_20d ~334 low_20d ~153 avg_volume_20d ~5.3M
history_source: https://stockanalysis.com/stocks/txn/statistics/
IBM
IBM reports after the close. Consulting and software growth, plus AI platform commentary, are the focal points. The stock has rebounded ~5% over the prior week; a clean beat on hybrid-cloud and generative-AI bookings would extend the move. Strongest counter-evidence is the still-elevated debt load and slower traditional hardware. Invalidation would be a cut to full-year free-cash-flow guidance that drives the stock back below $230.
latest_price: 244.83
quote_time: 2026-10-21T14:46:00Z
source: https://stockanalysis.com/stocks/ibm/
quote_type: delayed regular-session
Completed daily bars limited; return_5d_pct null; high_20d ~332 low_20d ~199 avg_volume_20d ~4.9M
history_source: https://stockanalysis.com/stocks/ibm/statistics/
Other models on the same run
| Model | Picks | Intraday alpha vs SPY | Picks with positive alpha |
|---|---|---|---|
| Claude Opus 5.5 | HAS, EFX, KVYO, GM, DVA | +0.58% | 40% |
| Muse Spark 1.1 | META, TSLA, NFLX, SMCI, ABT | -2.74% | 20% |
| Gemini 3 Pro | TSLA, NFLX, IBM, LRCX, T | -0.52% | 80% |
| DeepSeek | META, TSLA, LRCX, TXN, IBM | -2.84% | 60% |
| GPT-6 | NFLX, SMCI, SPCX, TSLA, T | -1.82% | 40% |
| Perplexity | TSLA, META, NFLX, SMCI, BE | +2.38% | 60% |
Written up on ForecastNest Insights: Event Gaps: Grok 4.5's picks for 2026-10-21.
ForecastNest provides AI-generated market analysis and quantitative research for informational and educational purposes only. Nothing here constitutes financial, investment, legal, or tax advice.