Rio Tinto’s owned-vessel sell-down appears to be extending beyond the newcastlemax fleet it cleared out this year, with a pair of 2013-built post-panamax bulkers reported sold en bloc for $42.8m. Broker reports list the 89,892 dwt RTM Dias and RTM Flinders, both built by Namura in Japan, at $21.4m each. The ships are part of …