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The Index is derived by subtracting the negative response to each question from the positive response to that question. The three resulting numbers are then added and divided by three. The index can range from +100 (everyone positive on all three measures) to -100 (all negative on all three measures). [9]
The Balance Score Method (net balance + 100) has been adopted to construct the index, where the index above 100 points indicates optimism (positive responses) and vice versa. The consumer confidence index (CCI), is an average of the current economic condition index (CECI) and consumer expectation index (CEI).
The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]
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The index number problem is the term used by economists to describe the limitation of statistical indexing, when used as a measurement for cost-of-living increases. [7] For example, in the Consumer Price Index, a reference year's "market basket" is assigned an index number of 100.
Market sentiment is usually considered as a contrarian indicator: what most people expect is a good thing to bet against. Market sentiment is used because it is believed to be a good predictor of market moves, especially when it is more extreme. [2] Very bearish sentiment is usually followed by the market going up more than normal, and vice ...
In other words, the US stock market's total market cap of about $61 trillion, as measured by the Wilshire 5000 index, is more than double the annualized US GDP of about $29 trillion.
2003: original index value was $2.80; $2.80/$2.50 = 112%, so new index value is 112; When an index has been normalized in this manner, the meaning of the number 112, for instance, is that the total cost for the basket of goods is 4% more in 2001 than in the base year (in this case, year 2000), 8% more in 2002, and 12% more in 2003.