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Hoots : Why values within a "Style Box" are discrete and not continuous? Style Boxes map financial products on a two axes diagram, but instead of using continuous values for the axes, they use discrete values (small/medium/large, - freshhoot.com

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Why values within a "Style Box" are discrete and not continuous?
Style Boxes map financial products on a two axes diagram, but instead of using continuous values for the axes, they use discrete values (small/medium/large, value/blend/growth, etc.).

(source)

How is this useful? Why should be able to shift a product between squares? What's wrong with using for example the actual (normalized?) market cap on one axis and the actual (normalized?) P/E ratio on the other axis, in the familiar Cartesian representation?


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It appears that in 2016 Morningstar presented a new framework for style box based analysis, which is continuous:

(source)

Another document from 2004 shows a similar continuous nature:

(source)


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