The commodities markets are cyclical, and we are about to enter a bull phase in which mining stocks become much more valuable relative to the broad market, said Rob McEwen, chairman of McEwen Mining. McEwen said that currently, several factors play a key role in determining the direction of gold prices, most important of which is the U.S. dollar. “One of the prime determinants right now is the strength of the U.S. dollar. If confidence in the dollar were to wane, then you’d start seeing all commodity prices starting to move up more,” McEwen told Kitco News on the sidelines of the Hard Assets Conference in Jekyll Island.