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 - 
Listen To The Story
Marketplace

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. 

 

Follow Lizzie O'Leary at @lizzieohreally