Offering banking services to unbanked, vulnerable populations is a model for lifting people out of poverty. It is also a model for indentured servitude and even modern day slavery. Microvest Capital Manages has invested over $1 billion in in microlending firms. Candace Smith, the firm’s head of risk, joined me to talk about how the firm ensures that it invests only on microlending companies that improve lives with a sustainable business model.