Warren Buffett can't seem to get enough of $Occidental Petroleum(OXY.US)$ stock.
He bought shares several times this week,according to a regulatory filing released late Wednesday.
The transactions bring Berkshire's total stake in Occidental to 18.7%. Berkshire is by far Occidental's largest shareholder.
Why Buffett takes more OXY shares?
The moves have been a boon to Berkshire.
Against the backdrop of soaring commodity prices, Occidental has benefited from th...