“The technological revolution that has swept through Wall Street and enabled stock trades to take place in milliseconds has thrust the equity market into a “crisis” that demands a regulatory response, a former high-frequency trader told Congress on Thursday.

David Lauer, who left his job at a high-frequency trading firm in Chicago last year, told a Senate panel that the ultra-fast trades that now dominate the stock market have contributed to frequent market disruptions and alienated retail investors.”

Read Dina ElBoghdady’s full article here