Beef packer margins improved to -$200/head last week, up $57 from the prior week as the Choice cutout strengthened while fed cattle prices moved lower. The cutout rose to $392/cwt, continuing its seasonal climb into summer demand, while fed cattle prices eased to $257/cwt. The improvement helped relieve some pressure on packer spreads, though margins remain firmly negative as cattle costs continue to absorb most of the gains in wholesale beef values. Feedlot placement margins weakened to -$263/head, down $42 from the prior week...