Potentially.

The Warsaw Stock Exchange and its Vienna-based peer said on Friday they are in talks on "mutual cooperation," with a view to a deal that could create one of Europe's larger equity trading platforms….

"At this point, Warsaw is bigger than Vienna, so Warsaw would acquire Vienna," said a person speaking on the condition of anonymity. A merger of the two exchanges would create ample room for cost cuts, the person said, adding that the companies would remain in the cities they operate.

The Polish government holds a controlling stake of 35% in the Warsaw bourse.

Of course, this is a proposed exchange merger, which means that there's a significantly better chance that not that nothing at all happens. Plus, what will Vienna's former Anschluß partners in Berlin think?

Warsaw, Vienna Exchanges Near Tie-Up [WSJ]