"Our research led on to other things, such as the fact that exchange rates are not lognormally distributed"

John C. Hull's quote recommends that the research he carried out led to the discovery that currency exchange rate are not lognormally distributed. This suggests that the exchange rates of various currencies do not follow a normal circulation pattern. Instead, the currency exchange rate of different currencies are subject to a range of aspects, such as financial and political conditions, which can cause them to fluctuate. This is essential to comprehend, as it can have a significant influence on the value of a currency and the cost of products and services. By understanding the aspects that influence currency exchange rate, investors and companies can make more informed decisions when it comes to trading and investing in various currencies.