The turbulent second quarter of 2013 left a big scar on bond king Bill Gross: a record quarterly loss from his bond fund and clients fleeing in droves.

Investors yanked nearly $10 billion in June out of Pacific Investment Management Co.'s $268bn Total Return Bond Fund run by Gross, according to fund tracker Morningstar. It was the biggest outflow from the world's biggest bond fund since Morningstar started tracking the fund's flow in 1993.