Bangladesh Bank (BB) has purchased another $176 million from commercial banks in its latest effort to stabilise the foreign exchange market amid signs of excess supply.Spokesperson Arief Hossain Khan told bdnews24.com that the central bank bought the dollars at Tk 121.5 each. "Bangladesh Bank will continue to play a role in keeping the dollar market stable. When rates drop, we intervene through auctions to absorb the surplus and prevent volatility," he said. "Thursday's auction marked the sixth such intervention by the central bank since July, bringing the total dollar purchase during this period to $764 million.Pubali Bank Managing Director Mohammad Ali welcomed the central bank's action, calling it "a stabilising force" for the currency market. "This is part of a strategy to prevent further depreciation of the dollar.