Greece's Okeanis Eco Tankers is increasing spot exposure as it forecasts "significant" boosts to tanker rates by late autumn.

The Oslo-listed VLCC and suezmax owner is also bullish about 2022 and 2023 as oil production and demand rises, and inventory draw-downs mean refiners will soon have to turn to tanker imports for crude.

"The bad news is this is as bad as we've ever seen the market," chief operating officer Aristidis Alafouzos told analysts on a conference call.