SIX Swiss Exchange Ltd is weighing the acquisition of a European Union bourse if a ban on trading Swiss stocks in the bloc persists or the situation worsens, according to people familiar with the matter. A deal could involve a full or partial acquisition or partnership, the people said, asking not to be identified as the matter is private. Potential targets include Bolsas y Mercados Espanoles, Sociedad Holding de Mercados y Sistemas Financieros, S.A. (BME:BME) and Wiener Boerse AG, one person said. While the owner of the Zurich bourse hasn’t retained a formal adviser, investment banks are helping identify targets, the people said. SIX currently sees no need to buy a stock exchange in the EU. Although inorganic growth is part of the SIX strategy, the focus lies in the area of the financial data business,” it said in a statement. “If, for whatever theoretical reason, the situation surrounding market access to the EU were to worsen, SIX would have to consider different options.” SIX initially declined to comment and the the Wiener Boerse declined to comment. The Spanish bourse didn’t respond to a request for comment on a public holiday.