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English definition of “diffusion index”

diffusion index

noun [C]
 
 
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)
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