Currency Wars: Are American Derivatives Dealers Leaving Europe?

Or possibly being invited to leave?

It is probably nothing, but I could not help but notice that Mr. Greg Smith, who has famously resigned from Goldman Sachs and company, was
"an executive director and head of the firm’s United States equity derivatives business in Europe, the Middle East and Africa."
Perhaps in addition to the anger he felt in the spoiled climate of his firm, Mr. Smith was