Investors often think of stimulative central bank policies as boosters for gold. But the European Central Bank's newly announced 60 billion euro ($67 billion) per month quantitative easing policy could be a bit different, traders argue.

The reason the Federal Reserve's late QE program was thought to be helpful for gold was that it would hurt the value of the U.S. dollar by creating inflation. It would consequently take more dollars to buy gold; in other words prices would go higher.