March's rally in rates suckered in retail investors, some of whom have stuck around.

On Marine Money's online tanker panel on Monday, International Seaways chief executive Lois Zabrocky, Diamond S Shipping head Craig Stevenson and Jefferies analyst Randy Giveans all said the profile of shipping investors had changed over the past several months amid spring's mercurial rates.

"The breadth of investors has certainly expanded," Giveans said during the panel's question and answer session.