Buffett and his team were active sellers of equities during the second quarter.
News & Analysis: Occidental Petroleum
The beleaguered oil company enjoyed a bounce-back month.
The deeply indebted oil producer needs help to address its balance-sheet issues.
Several issues weighed on the oil giant.
Oil driller Anadarko Petroleum is in the middle of a fight, and its shareholders are going to win big-time.
A double dose of bad news weighed on the oil company last month.