Oil rose on Aug. 9, recouping some of the previous day’s steep price slide, after the first round of U.S. sanctions against Iran came into effect, although confidence in crude demand has been hit by the escalating China-U.S. trade dispute.

Brent crude futures were up 19 cents at $72.47 barrel by 8:15 CST, after having lost more than 3% on Aug. 8. U.S. crude futures rose 6 cents to $67.00 a barrel, having closed down 3.2% the day before.

The U.S. on Aug. 7 re-imposed sanctions on Iran, the third-biggest producer in OPEC.

The renewed sanctions will not directly target Iranian oil until November, although U.S. President Donald Trump has said he wants as many countries as possible to cut their imports of Iranian crude to zero.

“The impact of it is the greatest known unknown of the year. If worst comes to worst and 1.5 to 2 million barrels per day of Iranian disappears from the market ... calculations will go out of the window and oil bears will have to brace themselves for a very rough ride,” PVM Oil Associates analyst Tamas Varga said.

As part of its most recent retaliation against Washington in the mounting trade dispute, China will impose tariffs of 25% on a further $16 billion in U.S. imports, which will affect trade in goods from fuel and steel products to autos and medical equipment. Crude oil will be exempt.

The ongoing trade war is rattling global markets and investors fear any slowdown in the world’s two largest economies would slash demand for commodities.

On top of the impact on the broader global economy, there is growing worry in the crude oil market about Chinese demand. Crude imports picked up in July after two months of decline, but were still among the lowest this year due to a drop-off in demand from smaller independent refineries.

The U.S. Energy Information Administration, meanwhile, reported that crude inventories fell 1.4 million barrels (MMbbl) in the latest week, less than half the 3.3 MMbbl draw analysts had expected.

Gasoline stocks rose by 2.9 MMbbl, compared with expectations for a drop of 1.7 MMbbl drop, as forecast in a Reuters poll.

In another sign that exporters are preparing for slower demand from some of the big Asian buyers, Iraq cut its official selling price for September cargoes of Basra Light crude for its Asian customers on Aug. 9.