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Workers sort packages at a UPS facility in Hodgkins, Illinois. - 

Earnings season continues this morning with a couple of giants: 3M and UPS. 3M manufactures seemingly zillions of things, including, of course, blue painters tape and Post-it notes. UPS, the well-known postal company, tracks global economic activity to an extent few companies can match. What do their earnings tell us about the state of the economy?
 

Follow Jeff Horwich at @jeffhorwich