In a new book, the co-founders of an equity broker explain why they believe that high-speed trading is to blame for the crisis in investor confidence. Financial News caught up with one of the authors to discover why he thinks that “predatory” trading practices are destroying the market.

Sal Arnuk and Joseph Saluzzi, co-founders and co-heads of equity trading at Themis Trading and well-known critics of high-frequency trading, have just published "Broken Markets: How High Frequency Trading and Predatory Practices on Wall Street are Destroying Investor Confidence and Your Portfolio."