What’s another few trillion dollars? U.S. debt is already approaching a historic $37 trillion and now, Congress is discussing adding at least another $3 trillion to the “debt ceiling.” Yes, that’s the phrase that many hear on the news but know little about. Our June Global Rates & Money Flows sheds some historic light on the topic:Get ready for a summer of apprehension in America as the financial markets fixate on the level of U.S. Federal government debt and whether lawmakers allow the legal limit on it to be (once again) raised. What is the “debt ceiling” and does it really matter?