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Sample data
S&P 500612.44+0.36%Nasdaq 100559.12+0.70%Dow 30448.76-0.19%Russell 2000232.05+0.54%ASML921.40+1.24%TSMC214.68+1.15%Costco904.22-0.35%MercadoLibre2,140.50+1.34%Berkshire486.90+0.21%Novo Nordisk88.34-1.58%S&P 500612.44+0.36%Nasdaq 100559.12+0.70%Dow 30448.76-0.19%Russell 2000232.05+0.54%ASML921.40+1.24%TSMC214.68+1.15%Costco904.22-0.35%MercadoLibre2,140.50+1.34%Berkshire486.90+0.21%Novo Nordisk88.34-1.58%
Issue 46Oct 19, 2026 · 1 min · From the deskFree

Three numbers we check every Friday

A five-minute routine that catches more problems than any earnings model.

This issue is free for everyone. It is the routine we recommend to new subscribers before they read a single research note.

Most investors do too much analysis at the wrong moment: right after a stock moves. The better habit is a small, fixed routine at a fixed time, so that the analysis is not contaminated by the price.

One: gross margin, in dollars

Not the percentage — the dollars. A company can hold a margin percentage while both revenue and gross profit shrink, simply by shrinking. Dollars reveal whether the machine is getting bigger.

Two: share count

Diluted shares, year over year. If it climbs faster than revenue, the growth is being bought with your ownership. This single line has saved us from more attractive-sounding stories than any other.

Three: the cash conversion of one large customer

Receivables days for the biggest customer cohort. When a business is extending terms to keep growth looking good, this number moves first — well before any management commentary admits a problem.

That is the whole routine. It is not clever, and it does not predict anything. It just makes you the person who notices.

ProcessFree issue