But over the same period, the nearby gold future has risen 52 percent.
Gold futures moved higher and held firm with the support of a softer dollar.
Gold futures fell nearly 5.4 percent, or $36.20, to $637.50 an ounce.
Gold futures also settled lower, while copper made strong gains.
Gold futures settled $1 to $1.30 higher, with August at $363.60 an ounce.
Gold futures for December delivery rose to $464.50 an ounce.
Gold futures settled $4.20 to $4.30 higher in New York.
Gold futures settled $6.20 to $6.70 higher in New York.
At the close of trading yesterday, the spot December gold futures contract was up $4.60, to $388.40.
Gold futures settled $3.60 to $3.70 higher, with April contracts at $422.20 an ounce.
