🗓️ Weekly Gainers & Losers — Oct 09, 2026

84 tickers with data (this Thu 10/08 close vs last Thu 10/01 close). QRVO excluded — delisted on Oct 5 after its $32.50 cash + stock merger with Skyworks (final close $114.17 on 10/02).

• 🟢 CIEN (Networking) +12.34% — $425.93 — AI data-center interconnect demand; ~60–70% optical sector growth outlook and bullish analyst/commentary sentiment.
• 🟢 ZS (Software) +9.07% — $216.81 — Cybersecurity rotation; KeyBanc CIO survey ties surging cyber budgets to Anthropic's Mythos AI model, lifting software/security names.
• 🟢 SPCX (Neocloud) +8.44% — $160.57 — SpaceX rally to highest since June; return of Musk to trillionaire status, momentum above IPO day close.
• 🟢 FN (Networking) +7.95% — $487.33 — Investors rotate back into AI-optics names on continued data-center optical demand.
• 🟢 SPOT (Consumer / Media) +7.13% — $526.42 — Analyst price-target raises on AI-driven product roadmap and stronger ad/margin outlook.
• 🟢 MTSI (Networking) +6.82% — $322.21 — AI optical/datacenter strength across the networking complex.
• 🟢 DELL (Hardware / OEM) +6.06% — $574.55 — AI server demand and strong enterprise/rack solutions momentum.
• 🟢 FTNT (Software) +5.81% — $189.10 — Cybersecurity/network-security sector rally on GenAI threat-driven budget growth.
• 🟢 CSCO (Networking) +5.64% — $114.89 — Broad networking/AI-infrastructure strength; risk-on tech tone.
• 🟢 NFLX (Consumer / Media) +5.48% — $71.57 — Live-sports push (World Cup rights commentary) and subscriber/ad momentum.

• 🔴 STX (Memory) -18.06% — $774.83 — Storage selloff on Toshiba's plan to double HDD output and supply-glut fears after huge 2026 run.
• 🔴 VICR (Analog / Power) -14.99% — $262.32 — Sharp profit-taking after a strong run; sector-wide analog/power slump.
• 🔴 WDC (Memory) -14.97% — $393.31 — Hard-disk supply expansion (Toshiba doubling output) and memory expectations reset.
• 🔴 SKHY (Memory) -11.89% — $170.50 — Memory correction extends despite blockbuster AI/HBM cycle as investors trim overheated 2026 gains.
• 🔴 INTC (CPU) -10.77% — $107.08 — Semiconductor reset / profit-taking; AMD overtaking in data center revenue and mounting foundry losses.
• 🔴 SNDK (Memory) -9.97% — $1609.46 — NAND memory supply-glut fears; second straight weekly decline after parabolic run.
• 🔴 UMC (Foundry) -9.48% — $22.82 — Foundry/circuit weakness amid broader AI-chip de-risking and rotation out of semis.
• 🔴 NVMI (Semi Equipment) -8.28% — $354.59 — Post-earnings pullback; semi-equipment selloff on AI-capex sustainability concerns.
• 🔴 CRWV (Neocloud) -7.89% — $81.58 — Weakened after a forecast miss despite a strong quarter; AI-capex sentiment wobble.
• 🔴 ONTO (Semi Equipment) -7.05% — $292.67 — Semi-capacity de-risking and valuation reset across the equipment group.