Stock Market
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Video

How fast is high-frequency trading?

Computers and clever maths enable stock market traders to buy and sell in the blink of an eye.

Algorithms - step-by-step mathematical procedures - generate automatic trades, conducted by computers, each one racing to be first.

But does high-frequency trading make things worse when things go wrong?

Tim Harford from Radio 4's More or Less demonstrates the speed at which it happens.

  • 10 Aug 2012
  • From the section UK