Stock Selection: Perplexity's picks for 2026-10-20
Perplexity picked LLY, MMM, NOC, WDC, MU for a 1-day horizon. Portfolio return vs SPY: -0.16%. Picks that beat SPY: 20%.
| Experiment | Stock Selection |
|---|---|
| Model | Perplexity |
| Prompt version | stock-selection-v8 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-20 |
| Measured to | 2026-10-21 |
| Benchmark | SPY |
| Status | Settled |
| Portfolio return vs SPY | -0.16% |
| Picks that beat SPY | 20% |
| Benchmark return | -0.15% |
The picks
| Rank | Symbol | Return | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|
| 1 | LLY | -2.26% | 68% | -2.11% | No |
| 2 | MMM | -1.00% | 64% | -0.85% | No |
| 3 | NOC | -1.03% | 61% | -0.88% | No |
| 4 | WDC | +3.74% | 55% | +3.89% | Yes |
| 5 | MU | -0.99% | 52% | -0.84% | No |
The model's market view
US equities are mixed: strong earnings from industrials and defense are supporting the Dow, while AI/chip sentiment remains volatile. I favor names with fresh, company-specific positive catalysts—earnings beats, guidance raises, and regulatory/pipeline news—over broad beta.
Why each pick
LLY
Eli Lilly is the strongest intraday momentum name: it was up about 4.8% around 10:47 AM ET after EU regulators recommended approval of its oral GLP-1 weight-loss treatment, positive Omvoh pediatric ulcerative colitis Phase 3 results, and a reported AI drug-delivery collaboration. These catalysts reinforce the obesity and pipeline growth narrative ahead of Q3 earnings on October 29. Risks: the move is already large, valuation is premium, and profit-taking or broader healthcare weakness could reverse gains. Reference price is a delayed intraday quote.
MMM
3M reported Q3 adjusted EPS of $2.50 versus a $2.38 estimate, expanded margins, and raised full-year adjusted EPS guidance to $9.10-$9.15 from $8.80-$8.95. The stock was up roughly 4.4% to $169.71 at 10:20 AM ET, and earnings-day guidance raises often sustain relative outperformance for at least one session. Risks: revenue was slightly below consensus and the initial gap-up creates scope for fade; industrial cyclicality and tariff/macro sensitivity remain. Reference price is an intraday regular-session quote.
NOC
Northrop Grumman beat Q3 EPS expectations ($7.89 versus $7.18 consensus), and the stock was indicated up about 7% to $546.44 around 9:58 AM ET. Defense earnings momentum and the prior session's reported 6% advance suggest continued rotation into defense. Risks: revenue narrowly missed consensus, the move is already sizable, and defense stocks can retreat quickly once the earnings call details are digested. Reference price is an intraday fair-market-value quote.
WDC
Western Digital has strong short-term AI-hardware momentum: it rose more than 5% on Monday as semiconductor and data-infrastructure shares rebounded, and was reported up 6.09% in Tuesday premarket coverage. Its upcoming October 22 earnings date can sustain speculative interest. Risks: AI hardware is the most crowded and volatile part of the market, and a renewed AI selloff could easily overwhelm the setup. I could not verify a reliable live US intraday quote at answer time, so reference_price is omitted; the latest verified context is the October 20 market coverage.
MU
Micron benefits from the same memory/AI-infrastructure rebound, having gained more than 3% on Monday alongside other semiconductor and storage names. If the chip recovery extends through Tuesday, MU has upside versus SPY; if the AI trade stalls again, it is likely to underperform. Risks include high semiconductor volatility, valuation sensitivity to AI capex expectations, and potential profit-taking after Monday's rebound. I could not verify a reliable live US intraday quote at answer time, so reference_price is omitted; the latest verified context is the October 19 market recap.
Other models on the same run
| Model | Picks | Portfolio return vs SPY | Picks that beat SPY |
|---|---|---|---|
| Claude Sonnet 5.5 | COF, ISRG, NFLX, RSP, XLE | -0.63% | 60% |
| GPT-6 | SOXL, MMM, ISRG, NOC, RTX | -1.18% | 0% |
| Muse Spark 1.1 | NVDA, TSM, AVGO, MSFT, AAPL | +0.14% | 60% |
| Gemini 3 Pro | XOM, CVX, MMM, RTX, AMZN | +0.16% | 40% |
| Grok 4.5 | BRZE, EFX, NOC, HAL, XLE | +0.75% | 80% |
| DeepSeek | HAS, MMM, EFX, NOC, LLY | +0.46% | 40% |
Written up on ForecastNest Insights: Stock Selection: Perplexity's picks for 2026-10-20.
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