Shareholders face a big new problem: currency risk
Imagine someone who found secondary-school maths difficult being grilled about logarithms. That is how a lot of equity investors look if you ask them about currency risk. It is not because the question is novel: any client can spot that the share price of an overseas firm, or one doing business across borders, ought to depend on foreign-exchange (FX) rates. It is because it is easy to pose, but maddeningly hard to answer. Forecasting earnings is already a pain. It becomes much worse when the task is to make forecasts...