Brent crude, the international benchmark, tumbled nearly 4% as China's economy showed weakness. Gasoline prices could keep falling, despite recent signs of upward pressure.
Oil prices have come well off their highs, but that hasn’t stopped Warren Buffett’s Berkshire from pouring money into the energy sector.
CEO Warren Buffett and his two investment lieutenants weren't nearly as active in the second quarter as they were in the first three months of the year.