Investment group Scottish Investment Trust said its net asset value per share total return in the first half of the year fell just short of 10%.The FTSE 250 group said its net asset value per share total return in the six months to the end of April was 9.8%, marginally ahead of the 9.6% return from the FTSE All-World Index and of the 9.2% return for the UK FTSE All-Share Index.Monetary stimulus from central banks had got the global stock markets off to a solid start in 2015, Scottish Investment Trust said in a statement on Monday, adding it had reduced its exposure to the healthcare and technology sectors in the period.Scottish Investment Trust were down 0.68% to 656.61p at 09:10 on Monday.