When choosing an investment trust, attributes such as performance, costs, and the discount or premium to net asset value (NAV) on which the company trades must be carefully evaluated. As well as doing such research, it can be useful to see where professional investors are putting their money. So, every year, we ask four managers of funds of investment trusts for suggestions in four areas: growth, income, wealth preservation and diversification. We also take a look at how their investment trust picks from last year are performing.