MarketWatch columnist Thomas Kostigen calls on the financial services industry to offer more products and advisors who can help individual investors enter the impact investing market.

"It's time for Wall Street to wake up to the fact that what investors want now is very different from what investors have wanted in the past. While 'greed is good' may have been the mantra of the financial community, what people are saying now is: 'greed can do good.'

"In small villages on tiny islands throughout Southeast Asia, people can now hear and read the news thanks to investments in local media organizations by the Media Development Loan Fund, an impact investing vehicle. In this region, governments tightly restrict television, radio and newspapers; censorship abounds. MDLF has changed the tide. And millions have benefited. People living in remote areas can become educated. Meanwhile, the fund has turned a profit.

"There are many impact investing stories to tell like this, from Asia to Africa and beyond. And there is much profit to be made."