Beef packer margins improved for a second consecutive week but remained firmly negative. Margins rose $70/head to –$179 as the Choice cutout advanced $4.56/cwt and fed cattle prices were largely stable. The recovery narrowed the gap between breakeven and cash cattle values to roughly $19/cwt, down from more than $26/cwt the prior week. While the improvement reflects modest stabilization in boxed beef demand, margins remain structurally pressured, and packers continue to face downside risk if the seasonal demand and pricing slump arrives as expected in February.  Feedlot placement margins improved meaningfully last week but ...