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Actionable insights — Adding to the Portfolio

Add to what you already own, publish the limit price first, and value each business on the metric its own economics require.
2026-MAR-15 · Compounding Quality (Substack) · Pieter Slegers · read ↗ · full analysis · transcript
How to read this page: each insight is a method used in this issue, written so it can be rerun on other names. Written post, so no timestamps.

1. Publish the limit price before the market opens

The repeatable method
  1. Decide the dollar amount, the share count and the maximum price you will pay, and write all three down before the session starts.
  2. Use a limit order rather than a market order, so the decision is the price rather than the moment.
  3. Commit publicly (or at least in writing) so the price cannot be quietly revised upward once the order does not fill.
  4. Accept a missed fill as a valid outcome — the discipline only exists if the order can fail.
Here: BN $25,000 / Q 650 / limit $38.50 (against a $39 quote); CSU.TO $15,000 / Q 8 / limit CAD 2,600; KPG.AX $10,000 / Q 2,700 / limit AUD 5.50. Each limit sits at or just below the market — a real constraint, not a formality.
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2. Deploy new money into existing conviction before adding new names

The repeatable method
  1. When new cash arrives, first re-rank the positions you already own by expected return; only look outside if none clears the bar.
  2. Size the adds by conviction rather than equally — the name you most want to own long term takes the largest share.
  3. State the terminal ambition for the largest position, so the sizing is a plan rather than a drift.
  4. Note the advantage: you already own the research, so the marginal cost of a decision is low and the risk of a fresh mistake is avoided.
Here: the entire $50,000 monthly contribution goes into three existing holdings, split 50 / 30 / 20 — and the reason for the largest is explicit: "I want to make Brookfield Corporation (one of) the largest positions in Our Portfolio."
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3. Value each business on the metric its own economics demand

The repeatable method
  1. Ask what accounting distortion sits between reported earnings and the cash an owner receives, and correct for it explicitly.
  2. For a serial acquirer, add back amortisation of acquired intangibles — it is required by the rules but is not cash (Buffett's "owner earnings"). Kelly Partners calls this NPATA.
  3. For an asset owner, use the cash actually distributable and the company's own asset value, not accounting profit.
  4. For a reinvestment compounder, use the return on each incremental dollar rather than any multiple, because that is what the value is built from.
  5. State the metric you are using and why, so the number can be argued with.
Here: three names, three metrics — KPG.AX on NPATA (21.8x 2026 → 9.6x 2029), BN on Distributable Earnings and NAV ($2.3 → $6.95; $39 vs $68), CSU.TO on CROI (29.1%).
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4. For a reinvestment compounder, track cash return on incremental capital

The repeatable method
  1. Take the change in cash generated over a period and divide it by the capital invested over that same period.
  2. Read the result as "for every $100 invested, this business now produces $X a year" — the compounding rate the business itself is achieving.
  3. Compare it with the multiple you are paying: a high incremental return can justify a multiple that looks expensive on trailing earnings.
  4. Monitor it for decay, since a shrinking incremental return is the first evidence the runway is closing — well before growth slows.
Here: CSU.TO at "29.1%" over three years — "for every $100 you invest, CSU makes $29.1 per year (!) for you."
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5. Answer your own doubt with a base rate, not with encouragement

The repeatable method
  1. When underperformance prompts "should I change something?", first find how often the best practitioners of your approach have lagged.
  2. Use a long, verifiable record: Buffett underperformed in 20 of 64 years — one third of the time.
  3. Compare your current drawdown against that base rate before concluding anything is wrong.
  4. Adopt an explicit expectation (Rochon's Rule of 3: one year in three the market falls 10%, one stock in three disappoints, one year in three you lag) so the next episode is anticipated rather than diagnosed.
Here: the doubt is written down first — "Should we make changes? Are we doing the right thing?" — and answered with the 20-of-64 statistic and Rochon's rule rather than with a forecast.
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6. Frame the portfolio as an income engine to make holding easier

The repeatable method
  1. Compute the portfolio's free-cash-flow yield and express it as cash per day — a number that does not move when prices do.
  2. Project it forward on a stated growth assumption, and convert back to a value only at the end, using an assumed exit yield.
  3. Run the projection twice: without contributions and with them, to show what the savings rate alone contributes.
  4. Label the assumptions out loud — growth rate, exit yield, horizon — because the output is extremely sensitive to all three.
Here: $1.3m at a 5.8% FCF yield = "$222,47 per day"; at 9% growth, over $1m a year in 30 years and "at a 4% FCF yield… $26.9 million"; with $50,000 monthly, "a little bit over $3 billion" and $122m a year.
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7. Close a succession worry with a verifiable fact, not reassurance

The repeatable method
  1. When a founder-operator leaves, identify precisely what they contributed — usually capital allocation rather than operations.
  2. Look for evidence that the function is retained: a board seat, continued ownership, an internal successor trained in the same discipline.
  3. Prefer third-party documentation (a shareholder letter, a proxy filing) over the company's own reassurance.
  4. Size the position for the residual risk rather than treating the question as closed.
Here: "In the annual shareholder letter of Francois Rochon (Giverny Capital), we could also find some good news regarding founder and former CEO Mark Leonard… he will stay on the board of directors."
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Methods distilled from the archived Compounding Quality post for personal study. Not investment advice.