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brent crude vs. usd market value
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i don't think the two are particularly linked.  while brick is right in that the price of oil is denominated in dollars, i don't think that's responsible for most of the movement here. oil has been weak for intrinsic reasons related to oil: supply/demand imbalance, largely.  (oil also was way over-priced back when it was > $100 a barrel; a lot of that was due to worries about instability in the middle east.) the dollar has been strong for other, separate intrinsic reasons.  the american economy has had a stronger rebound than europe or asia; while we were hit hard in the 2008 recession, we rebounded pretty quickly from a whole-economy point of view (we still have a lot of weaknesses in terms of long-term unemployment, but that doesn't seem to be hurting our productivity much).   pick another time period, and you won't necessarily see the same matching path (and i would even say that those paths don't match particularly well).  marketwatch covered this for example; other sites show similar things.  there is a weak correlation, but only in the short term, or for specific reasons.
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