// learn · Market history
When quality stocks de-rate
A company can keep growing and its stock can still fall for years, because the price you pay for that growth (the multiple) can compress. This is one of the least understood ways investors lose in "good" stocks.
Great company, falling stock
Around 2021, many excellent software businesses traded at very high multiples of sales. As interest rates rose in 2022, the maths changed: higher rates make far-off future profits worth less today, so long-duration growth stocks re-rated hard. Revenue kept climbing while share prices halved or worse. The businesses were fine; the price had been the problem.
Why rates do this
A growth stock's value sits mostly in profits years away. Discount those future profits at a higher rate and today's fair value drops, most for the highest-multiple, least-profitable names. That's why "quality" doesn't protect you if you overpay.
How to tell if you are overpaying
De-rating risk is measurable before you buy. The question is always the same: how much of today's price depends on things going right for a long time?
| Variable | What it measures | Where risk concentrates |
|---|---|---|
| Multiple vs its own 5–10 year history | Whether you pay a premium to the stock's own past | Trading well above its own historical range |
| Price ÷ sales, when profits are thin | Value assigned to revenue not yet profitable | High double-digit sales multiples |
| Share of value in far-future cash flows | Duration: sensitivity to the discount rate | Most value beyond year 10 |
| Real (inflation-adjusted) long rates | The discount rate applied to everything | Rising real rates compress multiples market-wide |
| Growth required to justify the price | The expectation embedded in today's quote | Needs growth few companies sustain a decade |
| Stock-based compensation vs reported profit | Real dilution hidden by adjusted earnings | Large gap between adjusted and GAAP profit |
A useful decomposition: your return equals earnings growth, plus dividends, plus or minus the change in the multiple. Over one to three years the multiple usually dominates. Over ten-plus years growth does. That is the whole argument for holding period as a risk control, not just patience.
Reading a 13F
Large US investors must disclose their holdings quarterly in a 13F filing. It's a useful window into what famous investors own, but read it correctly:
- It's delayed (up to 45 days) and only a snapshot, positions may already be gone.
- Longs only. 13Fs don't show shorts or many derivatives, so a "portfolio" can be misleading.
- Context over copying. Use it to study reasoning, not to blindly mirror trades you can't see the full shape of.
Educational market information, not financial advice. Markets carry risk of loss, do your own research.