With the Dow Jones Industrial Average still hovering near the 20,000 milestone and the Nasdaq resting at a record, the bulls may want to stop and look at a can of WD-40 sitting on a shelf in a local Walmart and ponder their enthusiasm. Better yet, just spy WD-40’s fiscal first-quarter results as a possible tell on the lackluster earnings season that could lay ahead this month and derail the market’s post-Trump election momentum.