The scandal at Volkswagen AG impacted the portfolios of many investors in European equities this week and raised questions about the carmaker's inclusion in sustainable stock market indexes. Allianz Global Investors, part of the asset management division of Europe's largest insurer, does not hold Volkswagen in its Global Sustainability fund, according to its portfolio manager Paul Schofield. He explains why to Bloomberg Brief Editor Siobhan Wagner and talks about the lessons sustainable investors can learn from this week's events. The interview has been edited for space and clarity.