Silver Standard Resources Inc. (NASDAQ:

) is moving higher, gaining 37 cents to $27.89, a gain of 1.3% on heavy volume. It's traded over 500,000 shares today, and given the fact it's the day before the last trading day before Christmas, volume is particularly heavy. Average daily volume is just over 1.2 million shares. Silver Standard Resources engages in the exploration, development, and production of mineral resource properties in Argentina, Australia, Canada, Chile, Mexico, Peru, and the United States.