Global stock markets have roared ahead in 2017, with the MSCI index of bourses in 47 countries up by 22% and almost $9tn (£6.6tn) according to Reuters. This has been fuelled by a boom in growth among developed nations and Donald Trump’s plan to cut US corporate tax rates – which is expected to boost company profits in the world’s largest economy and returns to shareholders. China managed to maintain its rate of expansion, dispelling fears over a potential sharp slowdown as it matures after decades of rapid growth, while the eurozone also staged a recovery after years of uncertainty. In Britain, the FTSE 100, packed with companies that earn much of their profit in foreign currencies, has surged as a result of stronger global growth and the weak pound since the Brexit vote