Gold Fields (GFI, news, chart, volatility) calls are active Thursday. Shares of the gold miner are down 51 cents to $6.34 and 13,300 December 7.5 calls traded. 89 percent traded on the offer and open interest is only 858 contracts. Looks like opening call buying on hopes for a rebound in GFI. Shares of the South African gold mining company have been falling along with the yellow metal, down 30.1 percent in October and now seeing another month-to-date loss in early-November. Gold has given back early gains and is down $8.60 to $733.80 an ounce today, down almost 20 percent since the end of September.