South Africa's antitrust watchdog postponed hearings into Wal-Mart's (WMT.N) $2.3 billion bid for a controlling stake in domestic retailer Massmart after the government and unions asked for more time to submit additional information.Competition authorities are the last obstacle to the world's biggest retailer taking a 51 percent stake in Massmart (MSMJ.J) after shareholders overwhelmingly voted in favour of the deal in January.The deal has pitted Wal-Mart against South Africa's trade unions, some of which have threatened to strike against the U.S. giant.
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