1/3 of the world's oil passes through Malacca Straits, so its possible - if the range of their missiles is high enough.

Then again, a lot of 'stuff' passes through that area, so you would expect to see price rises for many security-traded items.

I would stick with the Kuwait explanation.

rlaws,

  The one long range missile failed, and the other six are upgunned SCUDS, so they have little accuracy. A scare tactic.