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Message:: [QUOTE="900fine, post: 752432, member: 6036"]Actually, Doug, I did notice that. I looked at all 3,000 listings.  There's some value in what you're saying, but here's my concern : It doesn't take many mega-high end coins to dramatically skew the numbers. For instance, consider a $300,000 coin and a $300 coin. The big one completely dominates; the $300 coin can swing all over the place and have almost zero impact on the aggregate index. In fact, you can have 1 big one and 500 small ones and the big one still rules 20:1 in the example above (since the big was 1000x the small e.g. 500x20 = 1000). When I look at all 3,000 coins, I don't feel it is indicative of the market as a whole. They should add a "weighting factor" to the more common issues so they have more impact on the index. Just MHO.[/QUOTE]