http://www.cnbc.com/id/32690802 According to the article CL is affected by high-frequency algorythmic trading program. "an intricate scheme that allowed commodity traders in Chicago working for Optiver, a little-known company based in Amsterdam, to put their orders first in line and subtly manipulate the price of oil to the companyâs advantage. " The same behaviour was observed for broad equity market since the beginning of so called recovery. E.g. zerohedge warned many times about unusal activity of Goldman on NYSE. I'm wandering about Opriver strategies. If they only were hammering settlement price, why high-frequency algorythm has been involved? I mean Amaranth did it very successfully in the past whithout any math And if somebody place market orders steadily in front of pin-striped masses, will they be able to boost the prices in short term?