The document reports on the top gaining and losing commodities on the MCX exchange for July 12th, 2012. Menthaoil futures contracts across multiple expiry dates saw gains of 2.31-2.46%. Natural gas futures for July and August expiry rose 0.9-1.16%. Among losers were potato futures for July expiry down 3.01% and cardamom futures across expiry dates falling 2.25-2.69%. Cotton futures for various dates lost 1.15-1.39%.