Investment managers tend to over-estimate the positive impact their strategies are having, a new survey has suggested.

Abigail Rotheroe – an investment director at Snowball, the firm behind the report – said she believed investment managers should be reporting on impact the same way they do financial performance.

“Managers have a big responsibility in terms of improving the impact of the investments they make,” Ms Rotheroe told thewealthnet.

Snowball’s Managing for Impact report analyses the firm’s own portfolio of 21 fund managers, all of which are impact focused. S...