Here's how Wall Street was conned by a white supremacist who claimed he had a scoop on the US Treasury's "stress tests" of the 19 biggest banks.

The US market fell heavily, helped by some poor results from major companies, including a major bank. Big falls in Europe didn't help, but an early factor was a claim that the US Treasury's so-called stress tests of the country's 19 biggest banks had come up with some very poor results.