Investing.com - " Silver prices fell to a three-and-a-half week low on Tuesday, as ongoing expectations that the Federal Reserve will start to unwind its stimulus program by the end of the year weighed. Prices of the precious metal have largely tracked shifting expectations as to whether the Fed would start tapering its USD85-billion-a-month asset-purchase program sooner than expected. On the Comex division of the New York Mercantile Exchange, silver futures for December delivery traded at USD21.10 a troy ounce during European morning trade, down 0.8%. Comex silver prices fell to a session low of USD21.05 a troy ounce earlier, the weakest level since October 15. The December contract ended 0.16% lower to settle at USD21.28 a troy ounce on Monday. Futures were likely to find support at USD20.50 a troy ounce, the low from October 15 and resistance at USD21.89, the high from November 8. Speculation that the Fed may start to taper its USD85 billion-a-month asset purchase program as soon as next month mounted after official data last week showed that the U.S. economy added 204,000 jobs in October, much more than the 125,000 increase forecast by economists. Silver futures are down approximately 30% this year on concerns the Fed will begin cutting back its easy-money policy sooner-than-expected. The dollar index, which tracks the performance of the greenback against a basket of six other major currencies, was up 0.4% to trade at 81.47. A stronger U.S. dollar usually weighs on silver, as it dampens the metal's appeal as an alternative asset and makes dollar-priced commodities more expensive for holders of other currencies. Elsewhere on the Comex, gold for December delivery dipped 0.2% to trade at USD1,278.50 a troy ounce, while copper for December fell 0.5% to trade at USD3.244 a pound.

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