Extreme Movers: Perplexity's picks for 2026-10-05
Perplexity picked HPE, ON, TER, WDC, STX for a 1-day horizon. Average directional return: -2.60%. Directions called correctly: 40%.
| Experiment | Extreme Movers |
|---|---|
| Model | Perplexity |
| Prompt version | extreme-movers-v11 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-10-05 |
| Measured to | 2026-10-06 |
| Benchmark | SPY |
| Status | Settled |
| Average directional return | -2.60% |
| Directions called correctly | 40% |
| Benchmark return | +0.98% |
The picks
| Rank | Symbol | Direction | Price change | Return in the called direction | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|---|---|
| 1 | HPE | up | +2.50% | +2.50% | 74% | +1.52% | Yes |
| 2 | ON | up | +1.03% | +1.03% | 70% | +0.05% | Yes |
| 3 | TER | up | -2.06% | -2.06% | 64% | -3.04% | No |
| 4 | WDC | up | -6.49% | -6.49% | 72% | -7.47% | No |
| 5 | STX | up | -8.01% | -8.01% | 70% | -8.99% | No |
The model's market view
The October 2 source session was dominated by substantive technology catalysts: HPE benefited from an improved networking outlook and a large AI-server order, ON Semiconductor from revised Synaptics acquisition terms, and WDC and STX from a reported Toshiba HDD-capacity expansion. I favor continuation for the strongest catalyst-backed gainers and reversal for the two storage stocks after their unusually large selloffs.
Why each pick
HPE
HPE ranked among the top qualifying source-session gainers, rising 7.36% to $69.33 on October 2. The catalyst was substantive rather than purely speculative: the company had raised its long-term networking-growth outlook, and Vultr placed a reported $1.2 billion AI-server-rack order. I forecast continuation because the latest available October 5 pre-market quote was $69.67, above the source-session close, while the order and outlook revision provide a fundamental basis for the move. Risks include profit-taking after a record-high close, broad technology-sector weakness, and the possibility that the order was already fully capitalized. The quote is delayed pre-market data from October 5.
ON
ON Semiconductor gained 6.01% in the source session, closing at $84.89, and qualified on price, market capitalization, and dollar volume. The catalyst was substantive: ON agreed to acquire Synaptics in revised cash terms, replacing an earlier stock-swap structure, which reduced transaction uncertainty and improved the market's interpretation of the deal. I forecast continuation because the acquisition revision is company-specific and the latest reachable October 5 quote was $85.02, slightly above the source-session close. Risks include deal execution, integration concerns, and a fade in semiconductor-sector momentum. The quote is the latest delayed quote available for October 5.
TER
Teradyne was the largest qualifying source-session gainer, rising 8.00% to $449.04 on October 2. The catalyst was substantive but partly anticipatory: the company had recently launched the Magnum E2 memory tester for LPDDR6, DDR6, and GDDR7 chips, and the stock participated in a broader AI and semiconductor-equipment rally. I forecast continuation because the product expands exposure to next-generation memory testing, but confidence is lower than for HPE and ON because the launch preceded the source session and the move was partly thematic. The latest reachable October 5 quote was approximately $449.04, representing a stale delayed quote rather than a verified regular-session trade. Risks include valuation, profit-taking, and a reversal in semiconductor momentum.
WDC
WDC was the largest qualifying source-session loser, falling 10.22% to $415.29 on October 2. The catalyst was substantive and negative: reports that Toshiba planned to double AI-data-center HDD capacity threatened the scarcity-driven pricing and margin thesis. I forecast reversal because the decline was extreme, the stock had already repriced the reported risk, and October 5 pre-market coverage showed approximately a 1.7% rebound. The reversal could fail if the market concludes Toshiba's expansion will materially loosen supply or if additional capacity guidance appears. The latest quote available was delayed pre-market data from October 5, not a regular-session close.
STX
STX fell 10.21% in the source session to $848.99, making it the second-largest qualifying loser in the verified mover list. The catalyst was substantive and negative: the Toshiba HDD-capacity report challenged expectations for tight supply and future pricing, although it did not indicate a current collapse in Seagate orders. I forecast reversal because the decline was unusually large and the latest October 5 pre-market quote was $867.20, up 2.14% from the source-session close. The principal risk is continuation if investors treat Toshiba's planned expansion as a durable threat to Seagate's margins. The quote is delayed pre-market data from October 5.
Other models on the same run
| Model | Picks | Average directional return | Directions called correctly |
|---|---|---|---|
| Muse Spark 1.1 | TER, HPE, BE, ACLS, WOLF | -1.03% | 40% |
| GPT-5.6 Sol | WDC, STX, HPE, ON, STM | -4.14% | 0% |
| Claude Sonnet 5.5 | LW, PENG, RXO, MXL, CNXC | +2.63% | 40% |
| Grok 4.5 | MXL, PENG, TER, WDC, STX | +2.47% | 60% |
| Gemini 1.5 Pro | RXO, STNE, PAGS, INTC, PCVX | -4.56% | 20% |
| DeepSeek | WDC, STX, NKE, ACN, MXL | -2.35% | 40% |
Written up on ForecastNest Insights: Extreme Movers: Perplexity's picks for 2026-10-05.
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