The monthly Best Buys machinery: a fixed universe, a worst-performer sweep, a reverse-DCF hurdle, and a test for telling short-term noise from broken theses.
1. Do the quality work once, then shop only from the resulting universe
The repeatable method
- Pre-qualify a fixed "investable universe" of companies that already pass the quality screen — moat, high ROIC, consistent free cash flow.
- Each month, re-rank that universe on price rather than re-running the whole search. The monthly work is valuation, not discovery.
- Keep the universe stable so that month-to-month price moves become the signal.
Here: the best/worst-performer tables are explicitly "the best and worst performers in our investable universe" — the January five all come out of that pre-vetted pool.
Watch for
- A name entering the "cheap" list because the business deteriorated — the universe needs periodic re-qualification, not just re-pricing.
The repeatable method
- Sort the universe by trailing one-month return and read the losers first: "The cheaper we can buy great companies, the better."
- For each faller, identify the single reason given by the market, then judge whether it changes the ten-year cash flows.
- Treat the winners list as information, not as a source of ideas.
Here: the losers list produced FTNT (−18.9% on guidance) and framed AZO; the winners (Ulta, RH) got one sentence and no analysis.
Watch for
- Repeat appearances on the losers list month after month — persistent underperformance usually means the market knows something the screen doesn't.
3. Size the news against the price move — the noise test
The repeatable method
- Quantify the disappointment in the units the business actually operates in (a growth rate, a guidance change), not in the units of the share price.
- Set that magnitude against the market-cap move. A rounding-error miss producing a large decline is a sentiment event.
- Then zoom out to intrinsic value — book value, NAV, cash flow per share — and check it is still compounding.
Here: III.L fell ~20% because Action's like-for-like growth was 6.5% instead of 6.8%. "Investors were totally upset by the 0.3% difference. I kid you not." Meanwhile NAV doubled in three years and total returns averaged 30%/yr over five.
Watch for
- The opposite case: a small headline that is really a leading indicator (a churn uptick, a first price-led slowdown) — the test is whether the metric is a level or a trend break.
4. Use the reverse DCF as a hurdle, and compare it to delivered growth
The repeatable method
- Solve for the free-cash-flow growth rate the current share price implies.
- Line that number up against three references: the 10-year realised CAGR, the 3-year expected CAGR, and the long-term EPS estimate.
- Buy when the implied requirement sits comfortably below all three; skip when it sits above them.
Here: ZTS — the price requires 7.4% FCF growth, against 18.2% delivered over ten years, 13.9% expected over three, and a 7.8% long-term EPS estimate. "Zoetis seems to be undervalued right now."
Watch for
- A cheap-looking implied growth rate resting on a peak-margin FCF base — normalise the starting cash flow before trusting the hurdle.
5. Follow the disciplined operator onto the register — buy the playbook, not just the business
The repeatable method
- Track stake-building by acquirers with a proven operating playbook, and note the direction of travel (a stake rising over quarters, not a one-off block).
- Write down the specific improvements the playbook prescribes — cash collection, value-based pricing, cost discipline, return-gated M&A — and turn them into a margin gap you can quantify.
- Look for the first evidence the culture has landed inside the target (a cost review, a pricing change, a personnel move) before assuming it will.
Here: TOI.V went from 10% to 14.8% of ACP.WA in nine months; Constellation's Volaris claims it can take "just about any software company" to ~30% profitability, and Asseco's margins are "nowhere near" that — with Asseco South Eastern Europe already running "its first in-depth cost analysis in several years."
Watch for
- Whether the acquirer gains actual influence (board seats, governance) — a large minority stake without control can stall for years.
6. Invert the sign on a falling price when the company is a cannibal
The repeatable method
- Identify companies whose main use of cash is buying back their own shares.
- For those, treat a lower price as an operational input, not just a mark-to-market loss: the same buyback budget retires more shares, so per-share value builds faster.
- Confirm the buyback is funded from free cash flow rather than debt, and that share count is genuinely falling net of issuance.
Here: "A lower stock price is actually a good thing for Autozone. Why? It's a Cannibal Stock." (AZO appears in the losers table, and is read as a beneficiary of its own decline.)
Watch for
- Buybacks financed with leverage into a cyclical downturn — the mechanism only works if the cash flow holds.
7. Separate a cyclical trough from a structural decline before buying the fall
The repeatable method
- Trace the demand shock to its cause and date it (a pull-forward, a stimulus, a one-off build cycle).
- Ask what the boom left behind that generates recurring revenue afterwards — an installed base needing consumables and service is the tell.
- Buy when the market is extrapolating trough earnings as permanent and the moat (scale, distribution) is untouched.
Here: POOL — COVID pulled pool construction forward to a 2022 peak, earnings have fallen since, but the installed base needs chemicals and maintenance for decades. "Short term investors are seeing the earnings decline as permanent."
Watch for
- Whether the installed base is actually growing; and whether the trough is being deepened by a competitor rather than by the cycle.
8. Publish candidates, not the book — and say why
The repeatable method
- Keep the monthly write-ups to names outside the current portfolio, so the analysis is a genuine evaluation rather than a defence of an existing position.
- Treat the five as a ranked shortlist of candidates, not as a model portfolio.
Here: "We only talk about companies that aren't in Our Portfolio today. Why? We love all companies we own… The 5 examples we talk about in this article can be considered as serious candidates for the Portfolio."
Watch for
- Which candidates later enter the portfolio — the conversion rate is the honest test of whether the monthly list is conviction or content.
Methods distilled from the archived Compounding Quality post for personal study. Not investment advice.