"Right now, the futures prices are being limited by the cash market, which is still well below the futures prices we're seeing for summer hogs," Roose said. "Until those cash prices start to go up, there's only so much the futures market will and can do." But the cash cattle market has been rallying - with offers expecting to continue to rise this week and possible into next, Roose said. "The air is getting pretty thin up there, so it's going to be a question of who is going to keep buying beef at these prices," Roose said. In CME's lean hog market, June futures slipped 1.55 cents to 99.45 cents per pound.