Guinness

LAGOS (Capital Markets in Africa) Guinness Nigeria Plc, the country’s second-biggest brewer, posted its biggest loss in at least 30 years as production and financing costs rose in Africa’s most populous nation. The local unit of London-based Diageo Plc posted a loss of 4.67 billion naira ($14.8 million) for the six months through December compared with a profit of 1.17 billion naira ($4.71 million) a year earlier. Cost of sales rose by more than 50 percent while financing costs…