By Dennis A. Espinoza, KF10, El Salvador When I first heard about microfinance I saw it as a great way to make reliable returns. The emphasis on the social returns was great and the possibility of financial returns was even better! I’m in!

Turns out it isn’t that simple.

A recent New York Times article as well as other news like a recent initial public offering have stirred an old debate. Essentially that limited borrower options, comparatively high interest rates, low default rates and an estimated total asset base of over $20 billion may be fertile...