Um, ... I hate to point this out, but, there IS a shortage. When demand outpaces supply, causing the price of a good to go up -- that is the DEFINITION of a SHORTAGE.
There are two ways that price can come back down; (a) lowering demand -- shifting the demand curve Left; OR, increasing supply --shifting the supply curve to the Right.
The high prices themselves cause some leftward shift in the demand curve as people cut back on driving; but without a replacement good, there is no other way to reduce demand.
The supply of oil cannot be shifted right, because Congress (at the behest of their environut masters) will not allow drilling. Furthermore, the supply curve can currently only be shifted right by importing GASOLINE; that is, buying the already refined product. This is because we do not have the refining capacity to increase gasoline supply even if we had the oil.
Speculation is the biggest determinant of short-term fluctuations of price at the pump. Speculation (so-called) is based on the FUTURES market. That is, the buying and selling of oil futures at different prices. Why are they called oil "futures"? Because the futures market is based on the buying and selling of commodities at FUTURE prices.
Basically, speculators are betting on the FUTURE cost of oil. If they think that oil will be more expensive in the future, they BUY oil futures; this drives the price UP. If they think that oil will be cheaper in the future, they SELL oil futures; this drives the price DOWN.
So, why are speculators betting that oil will be more expensive in the future? Because no one is increasing SUPPLY -- i.e., no one is drilling for more oil.
What would happen if we started drilling (even if the oil is not actually produced until some FUTURE date)? Speculators would bet that the price of oil IN THE FUTURE will be lower than it is now. The would start selling oil futures TOMORROW. This would drive the price down IMMEDIATELY.
