FXC is a CurrencyShares Canadian Dollar Trust. Simply said, it is a convenient vehicle for those of us in the US for holding funds and collecting interest on them in Canadian Dollars (Loonies). It is far more convenient and less expensive (for reasonably small amounts) than the alternative of converting the funds, depositing them at a Canadian bank and than withdrawing and converting them back. Today was an interesting day in the markets, as many commodities and related companies' stocks took a bigger tumble than the market as a whole.