US crude oil prices on Friday dove below $40 a barrel for the first time since the 2009 financial crisis, notching their longest weekly losing streak in 29 years after a further rise in US drilling and a drop in Chinese manufacturing.
Oil prices pushed briefly below the $40-pivot mark following weekly data that showed US energy firms added two oil drilling rigs last week, the fifth increase in a row. The rise in rigs, which is emerging now after a second quarter lull in prices, is adding to concerns that US shale production is proving slow to respond to falling prices, prolonging a global glut.
"Everyone is still looking at it saying 'Wow, you still don't have production coming down,'" said Tariq Zahir, founder at Tyche Capital in Laurel Hollow, New York.
Energy markets slid early in the day as world stock and currency markets joined an extended rout across raw materials this week, a slump accelerated on Friday by data showing activity in China's factory sector shrank at its fastest pace in almost 6-1/2 years in August.
With deepening gloom over demand growth from the world's second-biggest oil user, and expectations for a significant build-up in surplus oil stocks this autumn, dealers said most oil traders were unwilling to fight the tide.
"The market is stuck in a relentless downtrend," said Robin Bieber, a director at London brokerage PVM Oil Associates. "The trend is down - stick with it."
US October crude fell $1.07, or 2.6 percent, to $40.25 a barrel by 1:41pm EDT (1741 GMT), having touched a new 6-1/2-year low of $39.86 a barrel. Front-month US crude has fallen 33 percent over eight consecutive weeks of losses, the longest such losing streak since 1986.
Brent oil fell $1.27, or 2.8 percent, to $45.35 a barrel, after hitting a low of $45.09 and threatening to break below $45 a barrel for the first time since March 2009.
Although the current collapse in oil prices, the second this year, has raised alarm within the Organization of the Petroleum Exporting Countries (OPEC), including some of its core Gulf members, there is no indication they will reverse their policy of keeping production wide open to defend market share, delegates told Reuters this week.
As a result, oil traders are looking for further signs of a slowdown in US production to put a floor under the market, something that appears to be taking far longer than expected as drillers grow more efficient and drive down costs.
Deferred oil prices have fallen sharply this week as a result, hit even harder than near-term futures. The December 2006 contract fell $1.50 on Friday, taking its weekly loss to over 9 percent, the biggest drop in over four years. December 2018 was down more than $2 a barrel.
Oil producers are "finding a way to make lower prices work, and the forward prices are adjusting to it," said Scott Shelton, commodities specialist at ICAP in Durham, North Carolina.