Supramax earnings have been steadily hitting new 2016 highs amid ongoing growth in global grain cargoes.

But the steady increase in outbound cargoes belies more earnings volatility due to uneven demand for backhaul cargoes and easing ship congestion.

The Baltic Exchange’s weighted average of supramax rates reached a new high for the year of $7,317 per day as of Tuesday, nearly triple the level seen back in February.