It’s the biggest mystery in global finance right now: Who conducted a sneak attack on the U.S. dollar this week?It began with a thinly sourced but highly explosive report Monday in a British newspaper: Arab oil sheiks are conspiring with the Russians and Chinese to quit using the dollar to set the value of oil trades — a direct threat to the global supremacy of the greenback.Is it true? Everyone from the head of the Saudi central bank to U.S. officials scrambled to undercut the story, but no matter.With the U.S. economy on the ropes and America by far the world’s biggest debtor, investors aren’t feeling as secure about the dollar as they used to. And the notion of second-tier economies ganging up on Uncle Sam didn’t sound so far-fetched.For American officials, the possibility of the dollar losing its long-term dominance in global commerce is a nightmare scenario because it would likely mean sharply higher interest rates at home and a declining ability to finance the U.S. debt. No one believes it could really happen right now, but stories like the British report this week make it seem incrementally more likely.

via Whodunit? Sneak attack on U.S. dollar – Eamon Javers – POLITICO.com.