Impact investing risks being marred by subpar measurement and reporting, leaving investors disenchanted with asset managers’ overly positive claims, says Brunno Maradei, global head of responsible investment at Aegon Asset Management.

Impact investing is founded on the notion that investors can pursue financial returns alongside positive and measurable social and environmental effects.

While Maradei says it is an exciting field, he fears it is being sullied by the attempts of some asset managers to gain a competitive advantage over rivals.