In looking at a group of 25 or so junior gold stocks that have mostly U.S. gold assets, ATNA Resources, Midway Gold and Pershing Gold have by far the best trading liquidity, [share price x average daily volume].

These are companies with market caps below $400 million.

This is important because the more liquid juniors will fit better with institutions. 

Pershing Gold will have even more trading liquidity when the CRGC shares are registered.