Over the past four weeks, we’ve had a run of undeniably good news. A panoply of data has shown that the U.S. economic system appears to be on firm ground. More people have jobs, albeit not necessarily sterling jobs, and the pace of overall activity as measured by GDP is at the highest level in two years, expanding at 4.1 percent annually. On the political front, Congress passed a budget for the first time in more than three years, which suggests a period ahead where Washington tantrums do not threaten to upend whatever delicate equilibrium currently exists.