Complex sentence: The Brazilian Federal government owns 52% of the stock of Eletrobrás, which is traded on BM&F Bovespa, on the New York Stock Exchange and on the Madrid Stock Exchange.
Split into simpler sentences: The Brazilian Federal government owns 52% of the stock of Eletrobrás, which is traded on BM&F Bovespa. It is alson traded on the New York Stock Exchange and on the Madrid Stock Exchange.