Section 05 · 3 entries
The Index
Choices buried in the weighting.
Three entries on the two choices inside every published index: which names are on the list, and what makes one of them count for more than another.
Double entry puts every figure in two places, so a discrepancy has nowhere to sit unnoticed.
Photo: Pixabay / PexelsThe entries
- 05 · 1
What an index is
A rule for selecting members and a rule for weighting them. Both are choices, and both change what the number reports.
- 05 · 2
Weighting
By price, by size, or equally — three indices of the same market that disagree.
- 05 · 3
Survivorship
Members leave when they fail, and the record keeps only those who stayed.