A surge in volatility in marine fuel markets has raised eyebrows, yet its long-term implications are ­expected to be limited.

While preparations for IMO 2020 are triggering large movements in fuel prices, market participants suggest it will be several quarters before the dust settles and shipowners have a clear ­supply-demand picture.

This could disappoint some companies that want to make a quick call on whether to install scrubbers, the exhaust gas technology that lets them continue ­using cheaper high-sulphur fuel oil (HSFO) instead of 0.5%-sulphur