Order Reprints Print Article Text size Toward the end of the year, donor advised funds (DAFs) become a popular vehicle for year-end tax breaks and philanthropic aims. But Casey van der Stricht, principal of Solve Innovation Future, a donor-advised venture fund, hopes DAFs will become something more: a forum for disruptive philanthropy as a source of impact capital. A donor advised fund is a charitable giving instrument that invests contributions, allowing contributors to receive a tax deduction for donations, and, over time, recommend grants to charitable organizations. The National Philanthropic Trust reports American DAFs have over $120 billion in charitable assets.