Asia’s near-dated time spreads for 380-cst fuel oil regained losses from the previous session, ignoring a substantial build in onshore Singapore inventories and drifting away from near-term fundamentals, traders said on Thursday.

Singapore inventories of residual fuels rose 11 percent, or 386,000 tonne, to a seven-month high of 3.98 million tonnes in the week to Feb. 22, official data released on Thursday showed.

“Spread bulls took over from the bears today,” one Singapore-based trader said.

The inventory increase followed a 47 percent drop in total exports from Singapore O-SGEXP-FO from the previous week to 455,000 tonnes, a three-week low.

“That’s the build that some of the traders don’t want to see … but guess what the market is doing now? Going up,” a second Singapore trader said.

Premiums of the Intercontinental Exchange-traded traded 380-cst fuel oil March/April time spreads were about 35 cents a tonne higher from Wednesday’s close at around $2.10 a tonne by 1730 Singapore time (0930 GMT).

Premiums for the 380-cst April/May contract also rose, up 20 cents a tonne from the previous session to plus 70 cents.

Traders said it was difficult to attribute any supply-demand fundamentals to the near-term backwardated market structure for 380-cst fuel.

“Supplies are even higher now and demand is a bit slow,” another trader said.

Most traders associated the strength in time spreads to an expected trading play that could result in soaring trade volumes.