Switzerland's foreign minister was travelling to Tehran on Sunday to sign a natural gas purchase contract between Iran and a Swiss utility, a deal she said could help ease Europe's dependence on Russian gas. 

http://news.google.com/news/url?sa=T&ct=us/2-0&fd=R&url=http://www.reuters.com/article/rbssIndustryMaterialsUtilitiesNews/idUSL1613888820080316&cid=0&ei=QDfdR9WMD4-ErgOjoPnTAg 

So what is the US going to do now? It can't stop the major banks and finance houses in EU with a fait a complis choice. The US can't say, "Ok guys, you either stop trading with the US, or stop trading with the Seyyeds in Iran".