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Actionable insights — Best Buys: May 2026

Underwriting a regulatory shock, reading a consolidator's formula, valuing an acquisition on margin mix, and pricing an expansion as a free option.
2026-MAY-03 · Compounding Quality (Substack) · Pieter Slegers / Team Compounding Quality · read ↗ · full analysis · transcript
How to read this page: the richest issue of the batch for method. Four of these insights are directly reusable on other names — the regulatory-shock framework, Brad Jacobs' consolidation formula, the margin-mix test for an acquisition, and the free-call-option framing of an expansion. The last is a caution about how fast a broken-moat thesis was declared intact. Written post, so no timestamps.

1. Underwrite a regulatory shock by asking what a customer would actually have to do

The repeatable method
  1. Establish exactly what the regulator authorised — permission to use an alternative, or a requirement to stop using the incumbent. They are very different.
  2. Walk through the customer's real decision: what systems, models and compliance processes are wired to the incumbent, and what replacing them would cost in time and risk.
  3. Ask whether the alternative is additive or substitutive. Adding a second supplier is far more common than switching.
  4. Check whether the grievance that drove the change is actually felt by the customer — if the cost is trivial to them, the political pressure has no commercial follower.
  5. Wait for evidence in the results, then decide. A price reaction is not evidence.
Here: FICO down over 55% after the FHFA "announced they are officially moving forward with VantageScore 4.0" for mortgage underwriting. The three-part answer: "even if lenders add VantageScore, they'll still pull FICO alongside it. In lending, more data beats different data"; "switching to VantageScore means a multi-year infrastructure overhaul most banks won't risk"; and "FICO's price hikes are negligible on a $500K mortgage."
Watch for

2. Judge a serial consolidator by whether the operator has run the formula before

The repeatable method
  1. Write down the operator's stated method as steps, not adjectives.
  2. Check each step against the current company: is the industry genuinely fragmented and analog; has capital been raised ahead of the deals; is technology actually being deployed?
  3. Count prior completions, not prior attempts, and note the industries — a method that transfers across industries is a method; one that worked once is a circumstance.
  4. Size the remaining runway (industry size against consolidated share) to see how long the machine can run.
  5. Then ask what the formula needs that is not present this time — cheap capital, willing sellers, a benign regulator.
Here: Brad Jacobs at QXO. The formula: "Identify a Fragmented, Analog Industry… Buy the Anchors… Use Tech to Become Efficient." The record: United Waste Systems sold for $2.5bn (1989); URI built "from scratch" (1997); XPO grown from $175m to $15bn of revenue (2011). The current run: "over $30 billion on acquisitions" in twelve months into an $800bn industry, with AI applied to pricing and inventory across 1,150+ locations.
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3. Value an acquisition on the margin it imports, not only the revenue it adds

The repeatable method
  1. Get both companies' margins on the same measure before the deal.
  2. Weight them by revenue to get the mechanical combined margin, before any synergies.
  3. Compare that to management's stated combined figure — the difference is what they are claiming from integration.
  4. Treat the mix effect as high-confidence and the synergies as low-confidence, and date the synergies.
  5. Ask why the higher-margin business was for sale.
Here: the QXO / BLD deal. "Before this acquisition, QXO had an Adjusted EBITDA margin of around 8%. TopBuild has margins closer to 18%… QXO estimates that the combined company will have EBITDA margins of around 12%." Plus $6.2bn of revenue, 400+ locations, and $300m of annual synergies by 2030 — a five-year horizon, which is how long such claims usually need.
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4. Frame a risky expansion as a call option, and check you are not paying for it

The repeatable method
  1. Value the established business on its own — for a holding company, against NAV or the sum of the parts.
  2. Compare that to the market price. If the price is at or below the core value, the new venture is being valued at zero or less.
  3. Say what the venture would be worth if it works, and what it costs if it fails (the committed capital, plus management attention).
  4. Only call it "free" if the downside is capped at the committed spend and the core value genuinely covers the price.
Here: III.L — "even with the US risk, the stock is currently trading at a clear discount to its Net Asset Value. You are getting the European business at a bargain, and the US expansion is essentially a free call option." The commitment is bounded and stated: €400m, southeastern US, late 2027. The fear is named too — "investors are worried that Action will become the next 'Lidl' or 'Tesco' and fail to catch on in America."
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5. Use insider buying as an asymmetric signal, and only as corroboration

The repeatable method
  1. Check open-market purchases, not option exercises or grants.
  2. Size them against the insider's own wealth and salary, not against the company.
  3. Remember the asymmetry: selling has many innocent explanations, buying has essentially one.
  4. Use it to corroborate a thesis you already hold, never to originate one.
Here: KKR — "Despite the stock being down ~50% from its highs, insiders have been aggressively buying shares. There are lots of reasons for insiders to sell, but there's only one reason they buy. The stock is cheap." The same corroboration appears for KKR in Part III of the shopping list and for Constellation's Mark Miller and LVMH's Bernard Arnault elsewhere in the archive.
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6. In asset management, read fundraising in a hard market as the competitive test

The repeatable method
  1. Look at capital raised in a year when the industry as a whole struggled to raise.
  2. Compare to the firm's own history and to peers. Growth in a bad year is a share gain.
  3. Check the dry powder — undeployed committed capital — as the forward earnings pipeline and as an option on falling asset prices.
  4. Read the two together: raising in a drought and holding cash into a decline is the strongest position an allocator can be in.
Here: KKR — "While smaller firms struggle to raise capital in a high-interest-rate environment, KKR just keeps growing. Record Capital: in 2025, they raised a record $129 billion… Dry Powder: they have roughly $126 billion in cash waiting to be deployed. In a market where assets are getting cheaper, KKR is ready to buy." AUM approaching $750bn.
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7. Identify a Veblen good, because it inverts how you read a price increase

The repeatable method
  1. Ask whether raising the price increases desirability. If so, normal price-elasticity reasoning does not apply.
  2. Check the mechanism sustaining it: deliberate under-supply, controlled distribution, and a secondary market trading above retail.
  3. Check who owns it — sustained under-supply requires an owner who can ignore quarterly volume pressure.
  4. Then model demand off the wealth of the customer base rather than off the consumer cycle.
Here: RMS.PA — "Hermès is the ultimate Veblen Good. This means that as the price goes up, the demand increases because the prestige grows." Sustained by the waitlist, by vertical integration "from the tanneries to the workshops", and by a customer base whose spending holds up: "Hermès is often the last luxury brand to feel a slowdown and the first to recover." Evidence: €16bn revenue in 2025, +9% at constant rates, a 41% operating margin, while LVMUY in the same portfolio calls demand "tepid."
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8. Decide whether your "best buys" list includes what you already own, and say which

The repeatable method
  1. Choose a rule: rank the whole eligible universe, or rank only the names you do not own.
  2. State the rule in the issue, every time.
  3. Be aware of what the choice hides — excluding holdings means the ranking cannot tell you that a current position is the best available use of new money.
  4. Cross-check with a separate list that does rate the holdings, so both questions get answered.
Here: "Please note that the companies in Our Portfolio are not mentioned here. We love all companies in Our Portfolio right now." That is why MEDP (-12.8%), BRO (-7.7%) and KPG.AX (-7.2%) appear in the worst-performer table but nowhere in the top five. The gap is filled four days later by the Buy-Hold-Sell list, which rates all 18 holdings alongside the watchlist.
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Methods distilled from the archived Compounding Quality post for personal study. Not investment advice.