Charles Schwab’s Liz Ann Sonders says there’s still a possibility that the U.S. could have its credit rating downgraded, but also says the implications of a downgrade may not be as dire as people think. Sonders notes that some countries, like Japan, have gone through a downgrade without seeing big rate hikes. And, if there is a U.S. downgrade and rates do go up, she expects it will be by “a marginal amount”.