Why does Yahoo! Finance report different prices for the same index?
I'm using Yahoo! Finance to compare the FTSE 250 and DAX indices.
However, I'm getting two very different results when comparing the indices over the same date range, depending on which I select as the primary stock to compare against.
Why is this?
(p.s. secondly, does anyone know how to force the time/X axis to be linear? The second chart skews the first 5 years. Sorry - I know that's a separate question!)
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Are you sure you're using the same date range? If you're using Max, then you're not, as ^FTMC goes back to 12/1/1985 while ^GDAXI only goes back to 11/1/1990. If I enter a custom date range of 11/1/1990 through 10/24/2015, I get:
and:
which, other than the dates it chose to use as labels on the x-axes, look identical.
(I tried to add the URLs of the charts, but it looks like the Yahoo! URLs don't include the comparison symbol, which makes them useless for this answer. They're easy enough to construct though, just add the secondary symbol using the Comparison button and set the date range using the calendar button.)
On your PS, I don't know, as you can see by my charts it even chose different labels when the date ranges were identical (although at least it didn't scale different dates differently), so maybe it's trying to be "smart" and choose dates based on the total amount of data available for the primary symbol, which is different in the two cases.
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