The oil price has been rising steadily for weeks. A major reason for this is the policies of OPEC and Russia. They have significantly reduced production volumes, and most importantly, they decided not to increase them for the time being, despite the recovering global economy. That could weigh on the economy and drive inflation further. But at the same time, there are enormous potential returns for investors - especially since the oil market has a special situation. This means that investors make profits even if prices stop rising - a rare but very lucrative opportunity. WELT explains how you can get in now.