Norwegian investment bank Cleaves Securities has expressed its concerns over what it calls Scorpio Bulkers' "discounted" bulker sales as the company seeks to move into the arena of wind-turbine installation vessels (WTIVs).

The US-listed shipowner said in August that it was ordering up to four WTIVs at Daewoo Shipbuilding & Marine Engineering in South Korea at a cost of up to $290m each.