Event Gaps: Grok 4.5's picks for 2026-10-02
Grok 4.5 picked NKE, MRNA, SYNA, ON, ACN for a 1-day horizon. Intraday alpha vs SPY: +0.38%. Picks with positive alpha: 60%.
| Experiment | Event Gaps |
|---|---|
| Model | Grok 4.5 |
| Prompt version | event-gap-v12 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-02 |
| Measured to | 2026-10-05 |
| Benchmark | SPY |
| Status | Settled |
| Intraday alpha vs SPY | +0.38% |
| Picks with positive alpha | 60% |
| Benchmark return | +0.06% |
The picks
| Rank | Symbol | Gap direction | Price change | Return in the called direction | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|---|---|
| 1 | NKE | -1.31% | +1.31% | 72% | +1.25% | Yes | |
| 2 | MRNA | +2.60% | +2.60% | 68% | +2.54% | Yes | |
| 3 | SYNA | -0.67% | -0.67% | 70% | -0.73% | No | |
| 4 | ON | +1.47% | +1.47% | 62% | +1.41% | Yes | |
| 5 | ACN | -2.49% | -2.49% | 65% | -2.55% | No |
The model's market view
Soft jobs data and lower yields support risk assets into the weekend, but single-stock event risk dominates the short window. Nike's guidance cut and restructuring dominate consumer discretionary, while index-rebalance flows and M&A activity drive selective biotech and semiconductor names. Anticipation of passive buying and deal completion can produce sharp one-session moves even without new fundamental data.
Why each pick
NKE
Nike reported Q1 results after the close on 1 Oct with a revenue miss and high-single-digit FY27 revenue decline guidance plus restructuring/layoffs. Shares gapped lower and continued selling into Friday session; emotional continuation and analyst target cuts remain elevated risk of further downside into Monday. Thesis is post-earnings momentum continuation lower; main risk is short-covering bounce if China commentary is re-interpreted positively.
MRNA
Nasdaq announced Moderna will join the Nasdaq-100 effective prior to open 9 Oct, replacing WBD. Passive index funds must buy shares ahead of and on the effective date; mechanical demand typically lifts the name in the days preceding inclusion. Thesis is anticipation-driven upside into the rebalance window; risk is profit-taking after the large YTD run or any negative clinical headlines.
SYNA
ON Semiconductor revised its acquisition of Synaptics to an all-cash deal at $123 per share (approx $5.7 B). Shares jumped sharply on the news as the cash premium removed prior stock-deal uncertainty. Thesis is continued upward pressure toward deal value as arbitrage capital accumulates; risk is any regulatory delay or renegotiation that widens the spread.
ON
Same cash deal for SYNA is viewed as strategically positive for ON Semiconductor, removing prior dilution concerns of the stock deal and clarifying capital allocation. Shares rose in sympathy on the announcement. Thesis is positive sentiment continuation on acquisition clarity; risk is concerns over cash outlay size or integration costs that could pressure the buyer.
ACN
Accenture reported strong Q4 results and raised full-year guidance on 1 Oct, driving a large gap higher. Follow-through buying on the positive print and AI/consulting demand commentary is expected to persist into the next session. Thesis is earnings-momentum continuation higher; risk is broader market profit-taking or any cautious commentary on discretionary IT spend.
Other models on the same run
| Model | Picks | Intraday alpha vs SPY | Picks with positive alpha |
|---|---|---|---|
| Perplexity | NKE, MU, ACN, IART, FCX | -0.23% | 40% |
| GPT-5.6 Sol | NKE, STX, WDC, TWLO, MRNA | -2.59% | 40% |
| Muse Spark 1.1 | TSLA, MU, NKE, MRK, PEP | -0.51% | 60% |
| Claude Opus 5.5 | NKE, STX, ON, WDC, FICO | +3.19% | 80% |
| DeepSeek | MRVL, PENG, AEHR, NEOG, ON | +0.45% | 60% |
| Gemini 1.5 Pro | NKE, MU, AYI, WBD, ACN | +1.17% | 60% |
Written up on ForecastNest Insights: Event Gaps: Grok 4.5's picks for 2026-10-02.
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