Calls
16
#35
Alpha Score 97.0
zephyr_z9
Win Rate
81.2%
return
+23.1%
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Ticker
Side
Mentions
First Call
Call Price
P&L
Thesis
Theme
Source
Long
Feb 20
$950000.00
+49.7%
Buy SK Hynix alongside Samsung; author sees 100% upside for both HBM suppliers as Nvidia's Rubin GPU line potentially bifurcates into higher-spec and standard variants, driving premium HBM demand and pricing power.
AI Memory
Long
Feb 20
$190000.00
+21.6%
Buy Samsung as author expects a significant re-rating driven by premium pricing ($1,000–$1,200/stack) for Samsung's 13 Gbps HBM, potentially selected for a higher-TDP Nvidia Rubin GPU variant requiring higher-spec memory.
AI Memory
Long
Apr 11
$20.59
+25.5%
Buy ABF substrate suppliers Ibiden and Unimicron; Morgan Stanley identifies ABF substrate supply as a major gating factor for TSMC chip demand at least through 2027, making these constrained suppliers structural beneficiaries of AI-driven demand.
PCB/Substrates
Long
Apr 08
$318.21
+11.5%
Buy GOOGL ahead of anticipated SpaceX and Anthropic IPOs, which the speaker expects to be materially positive for Google — likely via Google's existing Anthropic investment unlocking value at IPO.
Hyperscalers
Short
Apr 07
$143.86
-96.8%
Short ARM as mobile shipment volumes decline 20-30%, creating a structural revenue headwind that requires an unlikely offsetting ramp in server CPU sales; the author argues ARM is not insulated from the consumer electronics downturn despite its AI/data center narrative.
AI ASIC
Long
Apr 05
$564.00
+69.3%
Buy Unimicron as a preferred ABF substrate play due to lower consumer exposure relative to peers, insulating revenue growth from consumer-cycle headwinds amid a projected supply-demand gap in ABF substrates.
PCB/Substrates
Long
Apr 05
$8209.00
+132.8%
Buy Ibiden as a preferred ABF substrate play due to lower consumer exposure relative to peers, insulating revenue growth from consumer-cycle headwinds amid a projected 26-46% supply-demand gap in ABF substrates through 2027-2028.
PCB/Substrates
Short
Mar 27
$11.34
-256.3%
Avoid/short SIVE — its CW DFB chip outputs only 65mW versus the 300-400mW required for CPO, forcing a workaround via DFB arrays with Ayar Labs, while Lumentum already demonstrated 800mW at OFC 2026; the power gap signals structural competitive disadvantage in CPO.
AI Photonics
Long
Mar 27
$385.50
-5.1%
Buy Win Semi (3105.TWO) as a semi-monopoly photonics foundry; author endorses the long thesis with specific data showing 2x-3x GaAs IC driver demand growth for 1.6T optical modules and an active DFB chip roadmap scaling from 100mW to 400mW, supporting accelerating revenue in AI optical and LEO supply chains.
Foundry Equipment
Long
Mar 25
$186.00
+36.3%
Author discloses an existing long position in Tower Semiconductor (TSEM), held for an extended period, indicating sustained conviction in the name.
Foundry Equipment
Long
Mar 23
$203.10
+137.9%
Buy AMD as its MI355x inference chips have reportedly surpassed NVIDIA's B200 in performance, making them a compelling choice for AI workloads and potentially driving demand/stocking behavior.
AI Compute
Long
Mar 19
$12.35
+37.2%
Buy Nynomic (M7U) as a cheap, mispriced supply-chain beneficiary of Aixtron's projected 2027-28 machine sales cycle; speaker sees significant upside if Aixtron volumes materialize.
AI Photonics
Long
Feb 23
$670.50
+33.5%
Buy Lumentum as the author explicitly recommends it as a better public-market opportunity, though no specific catalyst or detailed reasoning is provided beyond the directional call.
AI Photonics
Long
Feb 17
$532.00
+18.9%
Buy CATL as accelerated equipment depreciation is set to roll off, driving an unexpected near-term margin expansion; small competitors overstating capacity further reinforces CATL's structural advantage in the EV battery market.
Batteries & Storage
Long
Feb 17
$11.39
+104.2%
Buy passive component makers led by Murata (MRAAY) as AI-driven data center demand pushes MLCC orders to ~2x supply capacity, giving manufacturers pricing power and multi-year earnings tailwinds per management's own 3–5 year outlook.
Power Semis
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zephyr_z9 has 16 trade ideas tracked on Buzzberg across 16 tickers since February 2026. Win rate 81% across 16 evaluated calls, average return +23.1%. Ranked #35 on the Buzzberg Alpha leaderboard. Most covered: 000660.KS, 005930.KS, ARM.
