dabldy/iStock Editorial via Getty Images Petrobras (NYSE:PBR) is by far one of the cheapest oil companies today. Not only that, but the fundamental indicators are also very good, with high operational efficiency, good margins and cash generation, and consequently, high dividends, which, when added to positive operational prospects for unlocking more value and more production, make PBR stock very appealing to most investors. The problem is that there is always political uncertainty hanging over Petrobras, si ...