Beef packer margins reversed sharply to -$17/head from $120/head the prior week, as rising fed cattle prices more than offset a modest decline in the Choice cutout. Fed cattle prices increased $12.92/cwt from the prior week while the cutout slipped $3.24/cwt, compressing gross margins and pushing packers back below breakeven. The move reflects tightening leverage in negotiated trade, with feedlots capturing more value. Despite the weekly collapse, margins remain improved versus this time last year, though near-term pressure persists if cattle prices continue to outpace boxed beef. Southern Plains feedlot placement margins were ...