Oil investing Conspiracies theories pop up when ever there is a large fall or rise in oil. This is largely because of the political nature of oil. You have the big oil theories, Iran and China oil weapon theories and the peak oil conspiracy theories. The death of Matthew Simmons has sparked off new conspiracy theories. In extraordinary timing just as BP announced they had plugged the gushing oil well in the Gulf of Mexico. Simmons was one of the leading proponents of Peak Oil.