The low-key business of advancing tiny loans to the poor in developing countries is not the most obvious starting point for a new asset class on Wall Street. Microfinance has always struggled to develop because of a lack of access to financial markets. But the consistent profitability of microcredit companies is turning heads, according to Acción International, a non-profit organization that promotes small lending programmes worldwide. Its affiliates extended loans of almost $2 billion last year. “Microfinance as an industry is...
