91热爆

As 'high frequency' traders deploy computers and cutting edge technology to gain an edge on financial markets, how close are they to trading at the speed of light, and can regulators keep up? We visit a 'low latency' summit to find out what lengths people will go to in order to gain a nano-second's time advantage.

Also on the programme, John Schnatter, head of American pizza chain Papa John's explains how he got started, and whether he stands by critical comments he made about Obamacare.

Plus, a report from the 91热爆's Rahul Tandon in Calcutta, on a new Indian craze - male grooming.