Value Line (Geometric) Average
The Value Line Geometric Composite Index is the original index released, and launched on June 30, 1961. It is an equally weighted index using a geometric average. Because it is based on a geometric average the daily change is closest to the median stock price change.
The daily price change of the Value Line Geometric Composite Index is found by multiplying the ratio of each stock's closing price to its previous closing price, and raising that result to the reciprocal of the total number of stocks.
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