The Baltic Exchange’s main sea freight index, which tracks rates for ships carrying dry bulk commodities, inched up on Monday amid muted shipping activity. The overall index, which factors in average daily earnings of capesize, panamax, supramax and handysize dry bulk transport vessels, rose one point to 601 points. The capesize index was up 5 points at 551 points. Average daily earnings for capesizes, which typically transport 150,000-tonne cargoes such as iron ore and coal, rose $40 to $4,596. The panamax index was down 2 points, or 0.29 percent, at 685 points. Average daily earnings for panamaxes, which usually carry 60,000 to 70,000-tonne cargoes of coal or grain, were down $15 at $5,457. The handysize index was down one point at 346 points, while the supramax index was up two points at 628 points.