According to Axiom analyst Gordon Johnson, the global steel market is about to take another downward turn. It may still be too early to consider buying battered steel and iron ore stocks. Axiom maintains Sell ratings on the following iron ore and steel stocks: Rio Tinto plc (ADR) Cliffs Natural Resources Inc Joy Global Inc. United States Steel Corporation United Rentals, Inc. Caterpillar Inc. GATX Corporation Trinity Industries Inc