I am confused about price determination after value at risk historical simulation run, my evaluation day is 2014.March.31, for commodity forward, the floating leg is based on price 42.17286 (the eighth shift for VaR calculation, my holding period is 10 days), which is shown in the attached picture, but my commodity price curve is showing 41.***,if I click "commodity price" under calcuation basis tab, it shows in March.31.2014, my commodity price is 41.57 USD. thus I will like to know how 42.17286 derived, is it from commodity price curve or commodity price? at which point of time? and the difference between commodity price curve and commodity price, if in March.26 , commodity price curve show 42.68, but commodity price shows 41.57, is it inconsistent?
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