Of the Stockholm Stock Exchange's 49 members, 15 do not trade from Sweden at all.

ECONOMIST: A survey of financial centres: Capitals of capital | The

Driven by a desire to get bigger in the exploding options market, rival Nasdaq in 2007 struck deals to buy the Philadelphia Stock Exchange, the Boston Stock Exchange and Stockholm-based OMX (this last deal is being done with Borse Dubai).

FORBES: NYSE Looks For Options

It owns 10% of the Oslo Stock Exchange, and 60 other exchanges, depositories and clearing organizations, including the Nordic Exchange, an umbrella term used to describe the stock exchanges of Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga and Vilnius.

FORBES: Magazine Article