"67," pronounced "six seven," spread from a rap song, through sports and social media, to classrooms and homes across the U.S. But even the artist who coined it struggles to define it.

Reem Heakal is a writer who became an Investopedia contributor in 2003. Her writing covers a wide array of large-scale financial topics. Headquartered in Basel, Switzerland, the Bank for International ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...