Iran???s decision to sign a nuclear, non-proliferation treaty with six of the world???s current nuclear powers put a smile on the face of Mr. Market, sending shares higher in early trading in Asia, Europe and the United States. Iran was forced into signing this agreement — after peace-loving nations imposed economic sanctions that were too onerous for Iranian government leaders to shrug off. The biggest reason for a positive market reaction worldwide is that this treaty begins to remove one of the world???s largest political uncertainties. And we all know how much investors like uncertainty: not at all.