Nobel economist Paul Krugman takes a jab at Elon Musk and says dollar dominance isn't worth much to America.

• Paul Krugman said dollar dominance is overrated, and isn't worth more to America than "a fraction of 1% of its GDP."
• The Nobel Prize-winning economist criticized Elon Musk for being among those warning that the US is "weaponizing" the dollar. 
• "So ignore all the dollar doomers out there. Or better yet, consider what their hyping of a nonissue says about their own judgment," he wrote in a New York Times op-ed.

Nobel Prize-winning economist Paul Krugman said that the dollar's dominance of global trade and investment flows is overrated, and isn't worth more to America than "a fraction of 1% of its GDP".