Investment offices for some of the world’s wealthiest families are reducing exposure to US assets and favouring Chinese ones, along with those in other parts of the world, Swiss investment bank UBS has found.While North America continued to make up the biggest share of their portfolios, many planned to diversify in Asia and western Europe, according to insights the bank garnered from 307 family offices in more than 30 markets.Many of those surveyed also planned to increase diversification...