Foreign exchange
Foreign exchange - the conversion of one currency into another - is often conveniently, even a little wittily - referred to as "FX". It is a subject which prompts whoops of excitement from some people and howls of anguish from others.
Some fun little facts:
Recoverability of FX Losses for breach of contract
There was an ubroken golden stream of authority, dating back 200 years, that an English court would award you damages in sterling, and that was that. This thread was broken in the celebrated case of Miliangos v George Frank (Textiles) Limited