By Elliot Gulliver-Needham After a year of abysmal performance,the board of Baillie Gifford’s Shin Nippon trust have pledged to commit to a major tender offer if its problem persists. In the trust’s 2023 results today, the investment trust revealed that the trust’s share price had declined by 20.5 per cent, while net asset value declined by 14.9 per cent, compared to a benchmark rise of 6.3 per cent. The company’s problem of long-term underperformance has been ongoing. Shin Nippon has seen a 30.9 per cent share price drop over the last five years, compared to a growth of 12.9 per cent across a…