Feedlot margins stayed in the red last week and packer margins slid into the red on our latest edition of the Sterling beef profit tracker.

According to author John Nalivka's calculations, feedlot margins were $106 in the red, compared with the previous week at $109. Packers dropped from a slim $34 margin the previous week to a loss of nearly $16 per head.

The rest of the numbers reflect the deep summer slump the industry has been enduring. Here's the latest report.