It seems to take a lot to impress investors in Canadian miner Barrick Gold Corp. (TSX:ABX, NYSE:GOLD) It has promised a $1 billion share buyback while beating the Street with fourth-quarter results. Yet by mid-morning, the stock was down 1.3% after a buoyant premarket session, with commentators citing the flat dividend as the depressant. Net income from the world's second-largest gold digger was up 27% quarter on quarter at $479 million, giving earnings for the year of $1.2 billion, up from $432 million a year earlier.