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impairsonator has contributed to 1 posts out of 21191 total posts (0.00%) in 4,236 days (0.00 posts per day).

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Data and Content Support » NASDAQ 100 historical advance/decline data Sep 29, 2012 01:54 PM (Total replies: 2)

I've run into a bit of a problem with the historical advance/decline data.

First of all, there is a difference in the number of data points between the advance series and the decline series, on a daily frequency. From the start for both, 13/5/2002, advance (II5A.Z) has 2609 points, while decline (II5D.Z) has 2607 points. On top of this, the advance series isn't complete either because there were actually 2617 trading days in the period.

What gives?


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