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How does AIQ calculate the group and sector indices?
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0 Starting witht the 1st day of the index

Close price of component stocks 1st day

Current close / prior close = ratio

Summation of all ratios / # of stocks in group * group prior close (ist day close of index should be 100).

After 1st day

Summation of all ratio / # of stocks in group * groups prior close

High, Low, Close, Open

Current high / current close = ratio

Summation of all ratios / # of stocks in group * current close for the group
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