Spot differential for Asia’s 380-cst high sulphur fuel oil (HSFO) market sank into a steeper discount on Tuesday, while very low sulphur fuel oil (VLSFO) was rangebound from the previous session. Singapore 380-cst HSFO extended declines, with the product trading into a steeper discount day-on-day. Trafigura was the main seller on the window in recent …