Well, as many of us suspected, the oil markets have been manipulated:

Now will congress do something about this? What do you think? Even without gridlock it would be difficult, but with the current mix I suspect nothing will happen.

http://news.yahoo.com/s/ap/20080910/ap_on_go_co/oil_speculation

Study links oil prices to investor speculation
H. JOSEF HEBERT, Associated Press Writer

WASHINGTON - Speculation by large investors — and not supply and demand for oil — were a primary reason for the surge in oil prices during the first half of the year and the more recent price declines, an independent study concluded Wednesday.
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The report by Masters Capital Management said investors poured $60 billion into oil futures markets during the first five months of the year as oil prices soared from $95 a barrel in January to $145 a barrel by July.

Since then, these investors have withdrawn $39 billion from those markets as prices have retreated dramatically, the report said. Oil traded at about $102 a barrel Wednesday on the New York Mercantile Exchange.

"We have clear evidence the fund flow pushed prices up and the fund flow pushed prices down," said Michael Masters of Masters Capital Management, calling the amount of money moving into oil futures markets by large institutional investors in the early part of the year "way off the scale."

Masters said its analysis shows investors "began a massive stampede for the exits" on July 15 and that this caused the price decline.

"These large financial players have become the primary source of the dramatic and damaging volatility seen in oil prices," concluded the report......