Crude oil futures prices rose to $147 a barrel in the first half of 2008, 4 2 times the price of the same period in 2000, with an average annual growth rate of 20%, while the world economy grew at an average annual rate of about 5%, while world oil consumption demand did not jump at the same time, a sharp increase
From 2000 to 2008, governments generally increased their strategic reserves of oil
 This shows that the rapid rise in crude oil prices is not caused by changes in the world oil supply and demand, but by the crazy speculation of international investment capital in the oil futures market