Glossary term
Sleeve
Definition
A group of holdings that tend to share an economic story — equity, rates, real assets, cash. Diversification is about sleeves, not ticker count.
How it works
A sleeve groups holdings by the economic story that mostly drives them. The classroom uses four: equity, rates, real assets and cash. Holdings inside a sleeve tend to rise and fall for related reasons, so they behave less like separate bets and more like one bet held through several tickers.
Sleeves matter because ticker count measures how many lines a book has, not how many different things it depends on. Grouping by sleeve, or more precisely by what drives a holding, is the first step toward asking how many genuinely different stories a portfolio tells. It is a coarse tool, and under stress even sleeves can merge, but it is more honest than counting names.
Worked example
The classroom book has eight lines but four sleeves. Equity holds four lines worth 32% + 12% + 10% + 8% = 62%, rates holds 14%, real assets holds 8% + 6% = 14%, and cash holds 10%. Sum check: 62 + 14 + 14 + 10 = 100.
By ticker count the book looks spread across eight lines. By sleeve, 62% of it sits in one. If, hypothetically, each of the four equity lines were split in two to make eight equity lines, the ticker count would climb to twelve and the equity sleeve would still be 62%. Nothing about the exposure would have changed.
Hypothetical, for education only. Not a recommendation and not a prediction.
Common mistake
The mistake is believing that adding more names to a sleeve you already hold diversifies the book. New equity names are absorbed by the equity block almost without moving the number of independent stories. A longer list can feel like a safer one while the sleeve weights stay exactly where they were.