Glitches and merger talks

The world's largest financial market was gripped by software malfunctions at Goldman Sachs and Nasdaq OMX. Meanwhile, two of the largest US exchanges appear to be on their way to a tie-up as soon as next week. The FT's Arash Massoudi reports on a wild week for the US markets.

For more video content from the Financial Times, visit http://www.FT.com/video