It’s interesting that oil prices have slipped back below $100 a barrel ($92.92 for West Texas Intermediate, $96.65 for Brent Crude as I write this on September 15). An NPR article blames this mostly on weak demand, but also maybe on unexpectedly higher supply from North America. Some people are predicting this trend will actually continue:

The International Energy Agency made that point last week, when it said a weaker economic outlook in China and Europe is causing a remarkable slowdown in global demand growth. And demand is declining, West says, as global supplies surge due to the energy boom in North America — including shale oil production from North Dakota and Texas.

“There’s another 3 billion barrels a day that’s coming into the market and staying in the market,” he says. “This has really changed the global supply-demand balance very substantially” — and helped bring more stability to the market…

Fadel Gheit, managing partner and head of oil and gas research at Oppenheimer & Co., says oil prices will still spike higher when severe disruptions occur. But he thinks global supply will continue to grow and keep prices in check.

He predicts that will happen as fracking technology improves, reducing the costs of production.

“The break-even point continues to decline. Yes, we needed $80 [per barrel] oil for the North Dakota Bakken oil development to continue,” he says. “Now, it’s about $65. Five years from now, it could be $50, or even $40.”

In the quote above, I skipped over plenty of dissenting voices in this fair and balanced coverage. Nobody really knows why markets do what they do in the short term, and anything can be rationalized. Then when you go back and look at the data later, often the longer-term trend is staring you in the face. Over the past 10 years or so, the longer-term trend is oil hanging out around $100 or so, whereas it used to be $20-40 for decades and decades before that (this is all adjusted for inflation.) So we’ll see, but I’m not ready to pronounce $100+ oil dead yet just because we’ve been at $96 for a few weeks.