Beef packer margins were essentially unchanged at -$201/head last week as a modest increase in the Choice cutout was offset by steady fed cattle prices. The cutout edged higher to $392/cwt while fed cattle prices held near $257/cwt, leaving packer spreads largely unchanged. Margins remain deeply negative as historically strong cattle prices continue to absorb most of the seasonal strength in wholesale beef values. Feedlot placement margins deteriorated to -$319/head, down $56 from the prior week, as ...