I came across two articles on Joy Global today. The first one was at the Fool where they write:
"over 40% ROE, actually grew in 3Q, improving and lowering operating costs/efficiencis, recently approved another 1 billion share buy back bringing share count under 100m, best margins in the industry and the largest player in machinery for the coal business, which is the cheapest most abundant resource for energy in every country in the world."
The second one was at Seeking Alpha where the author writes that the current valuation is "ridiculous." He notes that the company has been buying up shares, which should help their EPS.