A businessman looks at a share prices board in Tokyo on December 10, 2015. Japan's share prices fell 254.52 points to close at 19,046.55 at the Tokyo Stock Exchange, as a strong yen dented exporters, and after Wall Street dropped on oil prices sinking to fresh seven-year lows
A businessman looks at a share prices board in Tokyo on December 10, 2015. Japan's share prices fell 254.52 points to close at 19,046.55 at the Tokyo Stock Exchange, as a strong yen dented exporters, and after Wall Street dropped on oil prices sinking to fresh seven-year lows - 
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This week Ben Johnson brings us a special director's cut from the Codebreaker podcast about the controversial practice of high speed trading. Listen above to find out how man is trying to change the system. 

 

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