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VXX tightens up its correlations

Here are two graphs, each comparing VXX to the SPY, and both are scatter plots.  The values look like this,  only there are about 2400 for each graph.

Sample data with first row being SPY and second being VXX

        SPY VXX

A       21    4
AA    47  -22

                  2400 tickers later           Etc.

VXX correlations with Market
(If the correlations were SPY against SPY the line would be a 45 degree angle)

Same graph  except for it is for Jan 7 2010

As you can see the correlations have significantly tightened up.