Nigerian billionaire, Cosmos Maduka, preaches on Lagos streets.

Billionaire Robert F. Smith, this year's commencement speaker at Morehouse College, told the graduating class on Sunday he's paying off their student loans estimated to be about $40 million. Here are things to know about the black-American billionaire.

Asia’s richest man Mukesh Ambani has helped his younger brother avert a stint in jail, stepping in to make an $80 million payment for his sibling Anil whose telecom-to-infrastructure empire is struggling under the weight of debt.

How much do you know about the world's youngest self-made billionaire?

Kylie Jenner, the founder of Kylie Cosmetics, has become the world’s youngest self-made billionaire after her company signed an exclusive partnership with Ulta Beauty Inc.

Billionaire oil magnate, Femi Otedola has revealed that the $500,000 which he allegedly gave Hon. Farouk Lawan as bribe was given to him by operatives of the Department of State Security.

The US has lifted sanctions on aluminum giant Rusal and two other firms linked to billionaire Oleg Deripaska, who had ties to former Trump campaign chief Paul Manafort. The move came despite objections from Congress.

The billionaire chairman of MB Holdings and owner of luxury boat builder Oceanco says the market for super yachts for ultra high-net individuals is still growing. Mohammed Al Barwani spoke to Bloomberg's Matt Miller in London.

Beyonce and Hillary Clinton made appearances at the wedding of billionaire couple Isha Ambani and Anand Piramal. The wedding may have been one of the most expensive ever.

Kumar Mangalam Birla, the billionaire chairman of the acquisitive Indian conglomerate that bears his name, talks about the nation's economy, the local currency, and the prospects for his businesses.

Thomas Flohr, chairman and founder of VistaJet, which operates a fleet of over 70 business aircraft that ferry executives, politicians and private clients around the world, talks about the his new company in Dubai.

Billionaire Li Ka-shing will be holding his annual press conference on Friday. Bloomberg's Stephen Engle reports on "Bloomberg Markets."will be holding his annual press conference on Friday. Bloomberg's Stephen Engle reports on "Bloomberg Markets."