Moody’s may downgrade 120 oil and gas companies, 55 mining companies By: MarketWatch January 22, 2016 at 11:37 AM EST Tumbling commodity prices, oversupply and weak demand lead Moody’s to place the two sectors on review for many downgrades. Read More >> Related Stocks: Alcoa Rio Tinto Plc ADR Schlumberger Ltd Transocean Ltd Vale ADR Representing One Ord Shs