An eyebrow-raising $40m stock incentive scheme introduced by Star Bulk Carriers last week is — like so many other things in shipping today — all about scrubbers.

The New York-listed bulker owner was one of the first to be convinced that exhaust-gas scrubbers are the way to go to meet the IMO 2020 emissions deadline.

Executives managed to persuade top shareholder Oaktree Capital Management that the filters were worth the investment.