Traders prefer to sell futures contracts when they've already made money on the investment, but still have plenty of time left before the expiration date. Thus, many consider it a good option to sell 3.5% Fuel Oil Cargoes FOB MED (Platts) vs. 3.5% Fuel Oil Barges FOB Rdam (Platts) Futures (Sep 2013) before Oct 1, 2013.