The Baltic Exchange’s main sea freight index, which tracks rates for ships carrying dry bulk commodities, remained unchanged on Monday. The overall index, which factors in average daily earnings of capesize, panamax, supramax and handysize dry bulk transport vessels, remained flat at 943 points. The capesize index was up 51 points, or 2.52 percent, at 2,075 points. Average daily earnings for capesize vessels, which typically transport 150,000-tonne cargoes such as iron ore and coal, rose$244 to $14,916. The panamax index dropped six points, or 0.81 percent, to 738 points. Average daily earnings for panamaxes, which usually carry 60,000- to 70,000-tonne cargoes of coal or grain, fell $49 to$5,913. Among smaller vessels, the handysize index dropped six points to 402 points and the supramax index fell 9 points to 724 points.