Oil is the most widely tracked energy commodity in the world. Oil prices have far-reaching effects on everything from gasoline to household products. Of course, it's also one of the world's most volatile commodities, having shot to nearly $150 a barrel in 2008, from less than $20 a barrel in the 1990s. In 2009, it dropped back down to $30 a barrel before trekking back up to its current levels. These wild swings are chaotic. But they create massive profit opportunities, as well. That's why we're committed to covering this topic in full, bringing you the latest developments.