Investopedia explains 'American Customer Satisfaction Index - ACSI'
Stocks of companies with high ACSI scores tend to do better than those of companies with low scores, while the national ACSI score has been shown to predict trends in both consumer spending and stock market growth.
The index uses customer interviews as inputs to a multi-equation econometric model developed at the University of Michigan. The index was first published in October 1994, and is updated quarterly on a rolling basis, with new data for one or more economic sectors replacing data collected the previous year.
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