Heidi Hafes of Shell Foundation reflects on the GIIN Investor Forum and the progression of the impact investing industry.

"The view of many people I spoke to at the GIIN forum was that, while things are clearly progressing, the real obstacle to unlocking this potential is a lack of investable opportunities. So can grantmakers play a role in catalysing the impact investment sector? Our experience, and that of a small but growing number of foundations and venture philanthropists, is yes. We could start by making better use of one of our biggest assets: access to risk-tolerant, patient, flexible capital."