This is a guest post by Chris Cook. Chris is Former Director of the International Petroleum Exchange, and is now a Strategic Market Consultant and commentator.

Clearly manipulation has been going on in the global market in oil – there's nothing new about that – it's what intermediaries who transact for profit do and have always done. Indeed, some market wags say that trading could be defined as “acceptable market manipulation”. But until the last few years what consenting adults were doing among themselves in the oil market didn't really affect the man in the street.

But things have changed. We have now reached the culmination of a process of financialisation of the oil market to a degree where the market has become entirely sociopathic. It now operates to the detriment of consumers and producers alike and for the benefit of the intermediaries who control the market.

How did we get here? Who's doing it? How are they doing it? And what can be done about it?

A fierce debate now rages among economists, investors, pundits and the puppetmasters of fiscal policy: What’s next, inflation or deflation?

Has the most massive money-printing spree in history successfully stimulated the global economy and put it back on an upward course with rising inflation? Or are we still in a global downturn, temporarily masked by the stimulus, with prices, wages and employment still falling?

A comforting 30% gain in the major stock market indexes since the March lows has given renewed confidence to the “green shoots” trumpeters who dominate the airwaves and the press.

But grayer and wiser heads in the investing community—like Dave Rosenberg, John Mauldin, Nouriel Roubini, Gary Shilling, Peter Schiff, and Dave Cohen—have a more bearish view. The financial sector must now deleverage, they argue, which means liquidating assets, repaying debt, saving instead of borrowing, and contracting in general. In their view, the process will take years, not months, and what we have seen since March is a classic bear market rally.

In this post last month, I described how the recent storage build might serve as a good proxy for describing a well supplied oil market. I also presented data suggesting that actual physical oil consumption may have been running 2 - 3 Mb/d beneath supplies.

In this post, I will present further evidence that oil markets have for some time been well supplied. Furthermore, it appears to me that both the run up last summer and the more recent run up in oil prices bear the hallmarks of an oil market now being heavily influenced by speculative forces.

As a result of these forces, I believe that there is a substantial chance that oil prices may again experience a rapid drop to perhaps as low as $30 barrel before Christmas. One reason I believe this is likely is based on my research with respect to US Oil Fund USO. In February USO held 100 000 WTI contracts (1 contract = 1 000 bbls), but this had dropped to 50 000 WTI contracts recently, as ETF purchasers increasingly switched to Natural Gas. Strange as it may seem, the sale of these USO contracts may be part of what is holding WTI prices up, and natural gas prices down. As the number of WTI contracts reaches a minimum, this influence may turn around the other way.