The euro PP started with 1 Euro. (imaginary amount to make the calculations easy) The US PP started with 1 US$. The exchange rate was 1.46 at Sept 14, so the quotient of the Euro PP value and the US PP value is 1.46
Now fast forward to May 8 2010. The exchange rate is 1.27 When I divide the Euro PP value by the US PP value we get 1.29
Observations: 1 - When we look at all the values, it seems that the the Euro PP value divided by the US PP value is close to the exchange rate. 2 - The sum of the euro PP and the US PP is nearly constant.( we started with US$ 2.46)
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