GET YOUR RED HOT TULIPS!:

Why oil prices will tank: Arguments that $4-a-gallon gas (or even higher) is here to stay are dead wrong. Housing's boom-and-bust cycle tells you why. (Shawn Tully, 6/06/08, CNN Money)

[E]ven if Saudi Arabia produces at $4 a barrel, if the final, multi-millionth barrel required to heat houses and run cars costs $50, and is produced, for argument's sake, at a flagging field in West Texas, the world price is $50. That's what economists call the equilibrium price: It's where the price that customers are willing to pay meets the production cost, including a cushion, naturally, for profit or "the cost of capital." [...]

So what does that barrel cost today? According to Stephen Brown, an economist at the Dallas Federal Reserve, that final barrel costs just $50 to produce. And when the price is $125, the incentive to pour out more oil, like homebuilders' incentive to build more two years ago, is irresistible.

It takes a while to develop new supplies of oil, but the signs of a surge are already in place. Shale oil costing around $70 a barrel is now being produced in the Dakotas. Tar sands are attracting investment in Canada, also at around $70. New technology could soon minimize the pollution caused by producing oil from our super-plentiful supplies of coal.

"History suggests that when there's this much money to be made, new supplies do get developed," says Brown.

That's just the supply side of the equation. Demand should start to decline as well, albeit gradually.

"Historically, the oil market has under-anticipated the amount of conservation brought on by high prices," says Brown. Sales of big cars are collapsing; Americans are cutting down on driving. The airlines are scaling back flights.

We've learned another important lesson from the housing market: The longer prices stay stratospheric, the worse the eventual crash - simply because the higher the prices and bigger the profit margins, the bigger the incentive to over-produce.

It's even possible that, a few years hence, we could see a sustained period of plentiful oil supplies and low prices, meaning $50 or below.

A similar scenario occurred following the price explosion in the 1970s and early 1980s. The price spike caused the world to cut back sharply on oil consumption. By the mid-80s, oil prices had fallen from almost $40 to around $15. They remained extremely low for two decades.