A “mystery” share price weakness for Unilever turned into a buying opportunity for investors on Wednesday, after an analyst said the owner of Marmite looked inexplicably cheap. Jefferies’ Martin Deboo said the consumer goods company may present a “fresh buying opportunity” after its unification completes next week, with a reweighting of its stock likely to prompt major inflows. Investors did not hang around, with the company’s shares rising 220p to £45.60, leading risers on a weak day for the FTSE 100. Despite a positive start to the session, London’s blue-chips lost their way, closing moderately down amid a drag from financial stocks. Barclays and Lloyds Banking Group were among the laggards, with the former dropping 6.8p to 143.4p to lead FTSE 100 fallers, after the European Central Bank warned that lenders may have underestimated the amount they will need to set aside to cover toxic pandemic-linked loans. Lloyds shed 1.4p to 38.1p. The risk-off mood, which followed a rise on Tuesday, left about two thirds of London’s blue-chips in the red. Risers included Melrose Industries, which climbed 2.5p to to 165.7p after saying it is trading “at the top end of the board’s expectations for 2020”.