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Pieter Slegers — How To Mentally Handle Tough Times

The month closes with the archive's most explicit market call — "more and more proof that we're in a bubble" — four named managers down 11% to 21%, and three holdings shown at their lowest forward multiples ever.
2026-MAR-31 · Compounding Quality (Substack) · Pieter Slegers · written post · read ↗ · transcript · actionable insights
One-line take: written in answer to a subscriber's question, and it goes further than any other March issue. The peer evidence is now numbered — Chris Hohn −11%, Bill Ackman −19%, Dev Kantesaria −20%, Chuck Akre −21% year to date — and the diagnosis is stated outright: "I think we're seeing more and more proof that we're in a bubble… What usually happens at the peak of a bubble? Momentum and high-beta stocks massively outperform the market while quality stocks underperform by a significant degree," with a Baron Capital chart as the evidence and 1999 as the precedent (Berkshire −19.9% against the S&P's +21%, a 40-point gap, immediately before the dot-com bust). The behavioural observation is the sharpest thing in it: investors "give up on" individual stocks and switch to ETFs precisely "when individual stocks are trading at very attractive valuation levels," then switch back after the recovery. Against the bubble reading, three holdings are shown at their cheapest forward multiples on record — Constellation Software, Brown & Brown and Fair Isaac. Then five rules: don't look at prices daily (he blurs the portfolio value in his own broker; his parents have not logged in since 2017 and the account is "probably 3x higher than what my parents think it is"), discomfort is the price (Rochon's Rule of 3), pick a strategy that suits you — "you can copy someone's stock idea, but you can never copy someone's conviction" — focus on what you control (buy wonderful companies, run by managers with skin in the game, at fair prices; track fundamentals, Owner's Earnings and free cash flow), and zoom out on mean reversion. Note the archive's own tension: the same issue that says quality outperforms in the long run also concedes the ETF book is where a nervous reader is being pointed.

1. Stocks & names mentioned

Three holdings are named — with no words, only their forward-P/E histories — under the sentence "some companies are trading at one of their lowest valuation levels ever." They are Positive: the charts are offered as the reason to keep buying quality through the drawdown. Berkshire is the 1999 precedent and is Neutral. Research legend: QT Qualtrim · SA Seeking Alpha · STK Stock Analysis; Constellation keeps its Toronto row id with research at the US OTC line (CNSWF). The four managers named with their drawdowns (Chris Hohn, Bill Ackman, Dev Kantesaria, Chuck Akre) are people, not securities, and are left to the talking points. Written post with no timestamps — the At link opens the article.

TickerNameResearchViewWhat he saidAt
CSU.TOConstellation SoftwareQT · SA · STK · FAPositiveFirst of three names shown at "one of their lowest valuation levels ever." No commentary is offered beyond the forward-P/E chart itself — the argument is entirely visual, placed directly after the bubble diagnosis as the counterweight: "While the market is trading at very rich valuation levels, some companies are trading at one of their lowest valuation levels ever." Consistent with the rest of the month: a Strong Buy on the 19 March sheet at 16.6x forward against a 31.5x five-year average, and added to on 15 March at CAD 2,600.read ↗
BROBrown & BrownQT · SA · STK · FAPositiveSecond of the three forward-P/E charts. Again no text — the chart is the whole argument. It is also one of the seven Strong Buys on the 19 March portfolio sheet (15.3x forward against a 24.7x five-year average, 38.1% under) and a category holding under "Where Rules and Humans Still Win" in the Portfolio Update.read ↗
FICOFair Isaac CorporationQT · SA · STK · FAPositiveThird of the three charts — and the most interesting inclusion. FICO is not a portfolio holding: it was written up and explicitly passed over on 1 March at 21.6x expected 2028 earnings ("this is still not very cheap"), then upgraded only Sell → Hold on 19 March. Here, twelve days later, it appears among the names "trading at one of their lowest valuation levels ever" — the visible waypoint on the path to it becoming a Best Buy in April.read ↗
BRK.BBerkshire HathawayQT · SA · STK · FANeutralThe precedent, used for the third time this month. "$10.000 in 1962 → S&P 500: $6 million; Berkshire Hathaway: $3.6 billion… you could take away 99% (!) of Buffett's returns and he would still have outperformed the market." Then 1999: "Berkshire Hathaway was down 19.9% while the S&P 500 increased by 21%… lagged the index by 40% (!)," followed by the dot-com bust. No view on Berkshire itself.read ↗

Stance = how each name is framed in this post. The five rules and the bubble diagnostic are on the actionable insights page.

2. Talking points

The drawdowns, named and numbered

The behavioural observation — and it is the best thing in the issue

The bubble call, stated plainly

Rule 1 — remove the number from view

Rule 2 — discomfort is the price, not the exception

Rule 3 — conviction cannot be borrowed

Rule 4 — the controllables, and the three dials

Rule 5 — zoom out

3. In plain English

A jargon-free summary of the thesis behind each argued name. (Renders on each name's consolidated page.)

CSU.TO — Constellation Software Positive

Constellation appears here with no words at all — just a chart of what investors have been willing to pay for its earnings over the past decade, with today's level at the bottom of the range. That is the whole argument, and in context it is a strong one: the issue has just argued that the market as a whole is in a bubble, and this is the counter-example.

The business is a collection of hundreds of small software companies that run one specific type of organisation each and are almost never replaced. Nothing about that changed this quarter; the price did. Compounding Quality added to the position two weeks before this article was published.

BRO — Brown & Brown Positive

Brown & Brown is an insurance broker: it finds the right cover for businesses and takes a commission, without carrying the risk itself. Revenue recurs because policies renew, and it needs very little capital to grow.

Like Constellation, it appears in this article as a chart rather than a paragraph — its shares are at one of the lowest earnings multiples in their history at a moment when the index is at one of its highest. Twelve days earlier the same publication rated it one of only seven Strong Buys in its own portfolio, at about 15 times forward earnings against a five-year average near 25.

FICO — Fair Isaac Corporation Positive

Fair Isaac owns the FICO credit score, licensed to the three American credit bureaus, so it collects a small fee every time someone applies for a mortgage, a car loan or a credit card. It also sells the decision software banks use to automate those approvals.

What makes its appearance here worth noting is the sequence. On 1 March this archive published the full bull case for FICO and then declined to buy on valuation. On 19 March it was upgraded only from Sell to Hold. Here, on 31 March, it is one of three companies shown "trading at one of their lowest valuation levels ever" — and the following week it becomes a Best Buy. The chart is the visible step between the pass and the purchase, which is exactly the discipline the March issues keep arguing for: write the case, name the price, and wait.


Summary derived from the archived Compounding Quality post (text in transcript.txt) for personal study. Not investment advice. © Compounding Quality / Pieter Slegers for source material.