Market movers: Stocks seeing action on Tuesday – and why

A look at North American equities heading in both directions On the rise Shares of Capital One Financial Corp. (COF-N) rose in trading on Tuesday after billionaire investor Warren Buffett's holding company disclosed it had taken a stake in the credit cards-focused bank. In its quarterly disclosure after the bell on Monday, Berkshire Hathaway (BRK.B-N, BRK.A-N) said it had a 9.92 million share stake in the company. The stake would be worth $954 million, based on the closing price on March 31. Warren Buffett's Berkshire Hathaway Berkshire invests in Capital One, sheds four stocks As of Monday, Capital One shares…