(Photo: MICHAL CIZEK, AFP/Getty Images) Q: Is Joy Global's pain over? A: Talk about a business that's more pain than joy: Supplying equipment to the commodity industry. Falling commodity prices are putting a squeeze on the entire industry. Weak demand for commodity gear is causing a startling lack of joy for investors in Joy Global. The company makes equipment used primarily to extract commodities like coal from the ground. The business is struggling... More