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Join the roomMullens & Co. was a stock brokerage firm founded in 1786. The firm served as 'government brokers', to the government of the United Kingdom. Its main focus was the gilt-edged market. Though they were primarily government brokers, they also held a number of private clients.The role of a government broker is to "raise new money and maintain an orderly market in gilt-edged stocks, "lengthening the debt" by issuing long-dated paper and buying in shorter issues." The government brokers would wear black silk top hats to ensure they could be seen – and thus the actions of the government could be seen – from all across the exchange floor.