 Tractor supply stock is down 2.7% since Friday midday. Speaking of tractors, there's news this week. John Deere is cutting about 600 jobs in its factories in the Midwest. The company known for its construction, mining, and farm equipment has seen sales slump this year, along with its competitors. John Deere is often seen as a bellwether for the economy. Marketplace's Megan McCarty Carino has that.