You have not yet voted on this site! if you have already visited the site, please help us classify the good from the bad by voting on this site.. Kilauea; mount etna; mount yasur; mount nyiragongo and nyamuragira; piton de la fournaise; erta ale. In finance, a foreign exchange option (commonly shortened to just fx option or currency option) is a derivative financial instrument that gives the right but not the.