HONG KONG/LONDON (REUTERS) - Standard Chartered's first-quarter profit tumbled 12 per cent on increased credit impairment and provisions for future loan losses as the coronavirus crisis hammered its borrowers, even as it expects an economic recovery later this year. The emerging markets-focussed lender's more positive tone contrasts with other European lenders that have posted earnings so far, saying it was seeing encouraging signs in China that the recovery could be yet more rapid than that. As a British-based lender focused on Asia, Africa and the Middle E...