TradeWinds first reported the deal at the start of the year and Korea's STX Offshore & Shipbuilding has now confirmed the order at STX Dalian in China.
Frontline boss Jens Martin Jensen signed the contract for four firm 181,000-dwt capesizes on Thursday.
There is an option for four more.
The price is around KRW 200bn ($187m) in total, STX said.
Delivery will be from the second half of 2014.
An
