By Robb M. Stewart 



  Barrick Gold Corp.'s shares continued to advance Monday in the wake of news Warren Buffett's Berkshire Hathaway Inc. holds a stake in the Canadian gold producer. 


  In morning trading, the Toronto-listed shares were 10% higher at C$39.41, while in New York the shares were up 11% at $29.85. Building on gains Friday after Berkshire Hathaway Inc. disclosed a roughly 20.9 million share stake in Barrick, the shares have risen roughly 60% year-to-date. 


  Write to Robb M. Stewart at robb.stewart@wsj.com