Glencore convertible sale explained

Source: REUTERS/Arnd Wiegmann

Swiss commodities trader Glencore's logo is seen in front of the headquarters in Baar near Zurich

Swiss commodities trader Glencore's logo is seen in front of the headquarters in Baar near Zurich, April 13, 2011. Glencore is expected to kick off a much-anticipated US$10bn listing this week, with the publication of an Intention to Float document that will confirm its plans after months of speculation. The listing -- which could be the largest to date in London and one of the largest in Europe -- will force the Swiss-based firm to shed its once-fabled secrecy and open up its huge and successful mining and trading operations to increased scrutiny.