A report from First Trust Advisors, L.P.: Turning off the global economic light-switch, and then turning it partially back on, has sent shockwaves through economic data that, while anticipated, have been jaw-dropping in both directions. For example, US retail sales plunged a combined 21.8% in March and April, before rising 17.7% in May. Manufacturing production fell 20.0% in March and April, before gaining 3.8% in May. Non-farm payrolls shrank 22.1 million in March and April, followed by a gain of 2.5 million in May. The savings rate surged to 33% in April, the highest rate ever recorded with current metrics. […]