Billionaire investor Bill Gross slams Jeff Gundlach over shared 'Bond King' nickname: 'To be a bond king or queen, you need a kingdom'

• Bill Gross slammed fellow money manager Jeff Gundlach over his "Bond King" nickname. 
• Both have shared the moniker as heavyweights of the fixed-income industry, but it hasn't sat well with Gross. 
• "Pimco had $2 trillion, ok? DoubleLine's got like $55 billion. Come on — that's no kingdom," Gross said. 

Billionaire investor Bill Gross fired shots at fellow money manager Jeffrey Gundlach, seemingly suggesting the latter wasn't worthy of the popular "Bond King" moniker that both share.