On Friday, Mr Bush convened the so-called Plunge Protection Team for its first known meeting in the Oval Office. The black arts unit – officially the President’s Working Group on Financial Markets – was created after the 1987 crash.

It appears to have powers to support the markets in a crisis with a host of instruments, mostly by through buying futures contracts on the stock indexes (DOW, S&P 500, NASDAQ and Russell) and key credit levers. And it has the means to fry “short” traders in the hottest of oils.

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