Central Gold Trust (GTU) is a closed-end mutual fund, which means that it trades like a stock on the NYSE. The fund owns only gold — the metal, not stocks. Closed-end funds trade based upon the bid and ask, without regard to their net asset value (NAV). Because of this, they can trade at a price that is at a “premium” or “discount” to their NAV. By tracking the premium or discount we can get an idea of bullish or bearish sentiment regarding gold.