 Cattle futures were not expected to trade Monday in the holiday short and week will keep traders guessing about cash prices. Packers could commit 28% on last week's purchases for deferred delivery. That could limit their aggressiveness this week, keeping traders cautious even though supplies remain tight. Boxed beef prices continue to trend higher with Choice gaining $2.86 and Select gaining $1.19 on strong demand. We'll look at the numbers next.