The figure remained unchanged from a 12% drop year-over-year in April.
The decline in sales decelerated for machines in the resource industry to a 27% drop in May vs. a 28% drop in April. For machines in the energy and transportation industries, the decline decelerated to 30% from 34%.
But the decline accelerated for sales in construction industries to 8% from 7% in April.
Caterpillar is a Peoria, IL-based manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives.
Separately, TheStreet Ratings team rates the stock as a "hold" with a ratings score of C.
Caterpillar's strengths such as its expanding profit margins over time are countered by weaknesses including a generally disappointing performance in the stock itself, feeble growth in the company's earnings per share and deteriorating net income.
You can view the full analysis from the report here: CAT
TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this article's author.