Keep some cash on the sidelines waiting for the day (which will arrive sooner or later) when Berkshire Hathaway stock falls. Then, given you already have a position in the stock, you may have an easier time buying more when the shares look more attractively priced.

Occidental shares were up 0.5% to $48.61 Tuesday. The Berkshire equity portfolio of about $300 billion is overseen by CEO Warren Buffett. Oc

Occidental Petroleum shares escaped a broader market downdraft Wednesday after Warren Buffett's Berkshire Hathaway disclosed it had bought more of the oil company's stock. Berkshire snapped up almost $36 million of Occidental shares late last week,