Meaning of “diffusion index” in the English Dictionary

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"diffusion index" in Business English

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diffusion indexnoun [ C ]

uk us

ECONOMICS the degree to which different economic indicators (= measurements of economic activity) are changing in the same way at a particular time:

March's diffusion index suggested Japan's recovery was losing steam.

FINANCE, STOCK MARKET a measure of the percentage of shares that have increased in value over a particular period of time

(Definition of “diffusion index” from the Cambridge Business English Dictionary © Cambridge University Press)