Invest · US Equity Research

Taking a company apart

My own equity research: sum-of-the-parts valuations, earnings breakdowns, what you have to believe, where the risks are. Each piece is a standalone page you can flip through, with sources listed at the end.

  1. SPXSlidesHistorical retrospective2026.09.15Chinese only

    The 2025 tariff shock, day by day

    Seven weeks down 18.9%, one day up 9.52%, and a new high eleven weeks later — all of it driven by policy rather than fundamentals. The full timeline against the real daily closes, with the VIX path and four things worth remembering.

  2. MATERIALSSlidesSector playbook2026.09.15Chinese only

    Basic materials, a playbook

    Five sub-sectors from the mine to the shop floor, each with a different business model and a different valuation anchor. Why a low P/E is a sell signal on a cyclical, and what to watch at each phase of the cycle.

  3. SCORECARDSlidesResearch scorecard2026.09.15Chinese only

    Six months later

    Six stock reports written in March 2026, each with stop-losses, add-on zones and profit targets. Reconciled against the actual daily closes — which levels triggered, which did not, and one plan that put its stop-loss and its add-on zone in the same thirteen dollars.

  4. Q1 BATCHSlidesBatch reconciliation2026.09.15Chinese only

    Eight earnings notes, five months on

    Eight Q1 flash notes written across two days in April, on one template and one macro variable. Five months later the six financials returned 8.8% equal-weighted against XLF's 8.4% — six deep dives for forty basis points, before costs.

  5. COSTSlidesTwo-engine breakdown + reverse-engineered pricing2026.09.11

    Costco, two engines

    One membership card, two engines that depend on each other: merchandise makes no money so members renew, and the fees are the profit. Placing 45× earnings inside Costco's own twelve-year history to work out which year, and what growth, the market is paying for.

  6. SPCXSlidesSum-of-the-parts valuation2026.09.10

    SpaceX, taken apart

    One company, three completely different businesses. Space, Connectivity and AI are valued separately against their own peers and added back together, to see which assumptions a buyer at $151 is paying for.

  7. TAXArticleArticle on ligangyan.com2026.09.01

    Does Canada really have no estate tax?

    Deemed disposition versus step-up in basis, four household scenarios with the tax bill worked out, and the US estate-tax filing trap for Canadians holding more than $60k of US stocks.

  8. MACROSlidesMacro · eight steps · two stocks2026.08.26

    One causal chain for US equities in H2 2026

    From the Iran war to the QQQ drawdown in eight steps: imported inflation, a Fed debating hikes, a higher discount rate, and why long duration got hit first. Three scenarios, then two places on the chain to act: EOG as the hedge, Alphabet as the offence.

  9. INSArticleArticle on ligangyan.com2026.08.11

    Hong Kong participating insurance, taken apart

    The 1% guaranteed part, the 15-to-20-year break-even, commissions of up to 100% of first-year premium, why it does not escape CRS, and how it compares with term life and an index fund.

  10. BASICSArticleExplainer2025.11.30

    What is dollar-cost averaging, and how do you do it?

    Why DCA works in volatile markets and trails a lump sum in rising ones, how value averaging and enhanced DCA work, and what actually matters over thirty years.

  11. BASICSArticleExplainer2025.11.30

    Valuing a stock by discounting: is the price reasonable?

    What goes into a discount rate, why a perpetual bond is worth D/r, the constant and growing dividend models, free-cash-flow discounting, and why one company can come out ten times apart depending on the model.

  12. SMRSlidesResearch note2025.11.29

    NuScale Power: the holy grail of AI-era energy, or a capital bubble?

    The only small modular reactor design with full US NRC certification, the AI data-centre power gap, the failed Utah project, the cash runway, and who is catching up. A dated view from November 2025.