Ivan Glasenberg made a fortune when commodities giant Glencore International went public in 2011 near the peak of a major bull market in commodities. When he debuted on the Forbes Billionaires List the following March it was with a $7.3 billion net worth. Fast forward a few years though and the unraveling of that cycle is hammering his bank account. Glasenberg in happier times, celebrating Glencore’s dual-listed 2011 IPO in Hong Kong. (PhotoMike Clarke/AFP/Getty Images) Glencore shares were in freefall Monday, plummeting 29.4% in London, knocking another $478 million off a net worth that has dropped to $1.3 billion and sent Glasenberg from a tie for the 301st richest person in the world as of March, to 1,335th place. http://www.forbes.com/sites/stevesc...sh-costs-ceo-glasenberg-another-half-billion/