The Association of Investment Trust Companies is hoping its new code of practice will lure new investors to the sector.
The code is designed to improve the quality of information included in trusts' reports and accounts.
The AITC is urging investment trusts to show their total annual costs and demonstrate how performance has been achieved in a user-friendly format. Its also recommending comparing performance to a benchmark, not to rival trusts.
AITC director general Daniel Godfrey says: “If we want to persuade more people to buy investment trusts we have to give them better information.”