Tsvangirai said that the problems in Zimbabwe began long before the recent election and that Mbeki had been part of the mediation discussion for close to a decade.

CNN: Tsvangirai: U.N. must act on Zimbabwe

The close juxtaposition of these disclosures has generated much useful discussion about secret stakes, their effect on the market, their effect on companies, and what changes or regulations can or should be mounted to address their potentially deleterious impact.

FORBES: The Stealth Bombers: Bill Ackman, Bernard Arnault, and the Conundrums of Secret Positions