By Elliot Gulliver-Needham Impax Environmental Markets has reported a 0.5 per cent decline in the net asset value (NAV) of the trust over the six months to 30th June. The investment trust reported a NAV of 429.3p at the end of June, compared to 434.9p as of 31 December 2023. The company, which is the UK’s largest environmental markets investment trust, said it had been impacted by investors’ preference for larger tech stocks over the period. Meanwhile, the assets preferred by Impax, which tend to be small and medium-sized companies that generate more than 50 per cent of revenue from environmen…