Oil posted the biggest weekly decline since early April on growing signs that a global economic slowdown is curbing demand. Prices are near the lowest level in six months.
West Texas Intermediate settled at $89 a barrel, ending the week nearly 10% lower. US gasoline consumption has dropped, stoking demand concerns, while low liquidity has added to volatility. Supplies from Libya also picked up, helping to shrink key oil futures time-spreads and ease the tightness in the market.
