The One-Page Summary That Gets Read
A research note's one-page summary is often the only part anyone reads in full — it needs to carry the claim, the strongest evidence, and the biggest caveat on its own, without depending on the reader continuing further.
A portfolio manager reviewing a new signal will often read the first page of a research note carefully and skim, or skip, everything after it. This isn't laziness — a PM might be evaluating six proposals in a week, and giving each one a full careful read is not a realistic use of time. The practical consequence is that the one-page summary isn't a preview of the research; for most readers, it is the research. It has to work as a self-contained document.
That means the summary can't just gesture at what follows ("see section 3 for details on the backtest methodology") — it needs to state the actual claim, the actual number, and the actual caveat, right there. A summary that says "we find evidence of predictability in short-term reversal signals" is not doing its job; one that says "a five-day reversal signal on the top 1,000 stocks by market cap produced a 0.9 Sharpe ratio after estimated transaction costs, from 2015–2024, concentrated in the smallest names in that universe" gives a reader everything needed to form a first opinion without reading further. The caveat matters as much as the claim — "concentrated in the smallest names" is exactly the detail a skimming reader needs to correctly discount the headline number, and burying it on page four means most readers never see it.
A good test for a draft summary: if a reader saw only this page and stopped, would they walk away with an accurate impression of the finding, including its main weakness? If the honest answer is "no, they'd think it's stronger than it is," the summary needs to change — not the full report, which can carry all the nuance, but specifically the part that gets read.
It's tempting to treat the summary as marketing copy for the full report, saving the strongest details for later pages as a reward for reading on. That instinct works against the document's actual purpose. Most readers won't be rewarded for reading on, because they won't read on — so anything genuinely important, whether it strengthens or weakens the claim, belongs on page one, not held in reserve.
Write the one-page summary as if it's the only page anyone will read, because for most readers it will be. It needs the actual claim, the actual number, and the biggest caveat — not a preview promising those things appear later.
Further reading
- Barbara Minto, The Pyramid Principle