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> As to other market statistics there easily can be differences if
> they choose to either "sample" the data or provide all of what they
> receive.
And they may calculate them differently. For example with
adv/decl issues and up/down volume, there are several ways you
could compute the index. I once tried several ways to duplicate
DTN's uvol/dvol numbers, and failed. I tried to find ANYbody at
DTN who knew how it was computed, and as far as I could tell
nobody knows. It's magic. "If the stock is up, it goes into up
volume, if it's down, it goes into down volume." Thanks, that's
very helpful...
Gary
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