A supply crunch caused international crude oil prices to rise sharply on September 14. Market worries about the tighter supply outweighed concerns about weak economic growth and rising US crude oil inventories.

West Texas Intermediate (WTI) crude for October delivery increased by US$1.64 (1.85%), reaching US$90.16/barrel on the New York Mercantile Exchange.

Brent crude for November delivery grew by US$1.82 (1.98%), settling at US$93.70/barrel.