From HuffingtonPost. Story by Brad Hurley.

When you buy shares of stocks or mutual funds on the stock market, you usually purchase them from another investor who’s selling them. The investor uses the money from the sale to buy other investments, or cashes it in for personal or business use.

A growing number of investors and philanthropists see that as a lost opportunity. What if you could put your investments to work in doing good, while still earning a decent financial return? That question is at the heart of a branch of socially responsible investing known as impact investing.

…Impact investing bypasses the stock market to invest directly in companies, organizations, and projects that generate social and/or environmental returns in addition to financial ones.

It’s not a tradeoff: impact investors don’t accept below-market returns in exchange for the satisfaction that their investments are contributing to a better world. Instead, they look for blended value: they seek competitive returns along with social and environmental benefits.

One of the most compelling examples of impact investing involves the company that brought mobile phone service to sub-Saharan Africa. Antony Bugg-Levine and Jed Emerson describe this story in their book, Impact Investing: Transforming How We Make Money While Making a Difference.

Celtel Africa, founded in 1998 by a Sudanese engineer named Mohammed Ibrahim, initially had a hard time attracting capital. Conventional investors saw Ibrahim’s venture as too risky and with limited potential for return.

Eventually Ibrahim found a firm committed to investing in Africa and other emerging markets. With that seed money, Celtel Africa went on to find more than 6 million customers, and was sold in 2005 to another company for $3.4 billion, providing triple-digit returns to its investors.

Cell phones have revolutionized life for many Africans, including creating a new mechanism for transferring funds.

Charities such as GiveDirectly, which rely on mobile phones to deliver payments, wouldn’t exist if it weren’t for the commitment of those original impact investors.

Read more at HuffingtonPost.