What Does SemGroup Reveal About The Price of Oil?

Silverseek.com:

In this case, it’s easy to see, based upon the timeline, how SemGroup’s trading debacle influenced oil prices, first up, then down. As the end came near for SemGroup’s large, increasing short position, that position was forcibly bought back (probably by SemGroup’s lead broker, said to be Barclays). This accounted, by my calculations, for the last $15 to $20 increase in the price of oil, up to the $147 price high. When the forced buyback of the short position was concluded, a buying void was suddenly created and prices then fell $20+ to date. So, not only did SemGroup manage to lose over $3 billion and go bankrupt in the process, it also dramatically influenced the price of oil and fuel for the rest of the world.