@LucyBuilding LucyBuilding
Thesis-driven AI-semiconductor supply-chain investor who maps memory, foundry and optics bottlenecks
Builds and shares a structured AI semiconductor supply-chain
Grade = how their written analysis reads (A best). Trader score = how their last-20 timestamped calls performed vs SPY. · Analyst brief as of 2026-06-22.
Across their last 20 scored bets: 55% hit rate, +2.12% mean alpha, trader score +1.46. Their last-14d mentions, direction-adjusted, have moved -11.4% since posting (mean over 17 mentions with price data).
LucyBuilding is mainly disclosing a levered AI infrastructure portfolio, with emphasis on memory exposure through SNXX, MUU, 000660.KS and 005930.KS plus optical names AAOI and ORCX. The distinctive read is that AI infrastructure demand favors memory and optical communications, while Oracle’s OCI growth, RPO, capex and power partnerships support a constructive cloud-infrastructure thesis. No clear flip appears in the supplied signals; the week is mostly portfolio recap and position disclosure, with macro caution around hawkish Fed tone.
The author’s week is concentrated in long AI infrastructure exposure, especially memory positions and related portfolio disclosure, with no supplied CALL_DIRECTIONAL signals. There is no evidence of a clean flip; the strongest late-week signal is the June 21 fund-letter cluster disclosing positions, gains, trims and leverage use. Pump-risk is more thematic than single-name here because several holdings share the same fund-letter rationale rather than repeated independent ticker-specific calls.
| date (PT) | ticker | author | sent | what they said | since then | receipt |
|---|---|---|---|---|---|---|
| 2026-07-02 | · | @LucyBuilding | · | Says she also holds it, but the referenced asset is only in prior context. | · | tweet ↗ |
| 2026-07-02 | 000660.KS | @LucyBuilding | -0.35 | Quantifies leveraged product decay versus SK Hynix, showing flat stock but 07709 down 19.09%. | · | tweet ↗ |
| 2026-07-02 | 07709.HK | @LucyBuilding | +0.15 | Long-form framework about learning options as risk management for volatile holdings. | · | tweet ↗ |
| 2026-07-02 | MUU | @LucyBuilding | +0.15 | Long-form framework about learning options as risk management for volatile holdings. | — | tweet ↗ |
| 2026-07-02 | DRAM | @LucyBuilding | +0.15 | Long-form framework about learning options as risk management for volatile holdings. | · | tweet ↗ |
| 2026-07-02 | SNXX | @LucyBuilding | +0.15 | Long-form framework about learning options as risk management for volatile holdings. | — | tweet ↗ |
| 2026-07-02 | MUU | @LucyBuilding | +0.55 | Added 10 shares of MUU around 790, near full position — Author says they added shares today and are near fully invested. | — | tweet ↗ |
| 2026-07-01 | PLTR | @LucyBuilding | +0.55 | BofA maintains Buy with $255 target; mentions Trump disclosed at least $1M PLTR holding. | +2.8% | tweet ↗ |
| 2026-07-01 | OUST | @LucyBuilding | +0.35 | Says they researched OUST but missed the rise. | -17.0% | tweet ↗ |
| 2026-06-30 | · | @LucyBuilding | · | Chinese framework on memory shortage, price rises, and alternatives in supply chain. | · | tweet ↗ |
| 2026-06-30 | · | @LucyBuilding | · | General investment decision framework on odds, sizing, and repetition. | · | tweet ↗ |
| 2026-06-30 | · | @LucyBuilding | · | Long Chinese risk framework warning about ergodicity and options gambling survivorship. | · | tweet ↗ |
| 2026-06-29 | MU | @LucyBuilding | -0.20 | Reports class action against memory firms and Apple price hikes due to memory costs. | -14.8% | tweet ↗ |
| 2026-06-29 | AAPL | @LucyBuilding | -0.10 | Reports class action against memory firms and Apple price hikes due to memory costs. | +9.5% | tweet ↗ |
| 2026-06-29 | QQQ | @LucyBuilding | +0.25 | Says Nasdaq may be better long-term choice for most people, but active management uncertain. | -1.6% | tweet ↗ |
Grade is our human read-worthiness rating; trader score is a rolling 20-bet hit-rate/alpha composite — different things, often disagreeing. “Since then” is direction-unaware in the table; the summary line above adjusts for which way they leaned.