In December 2014, investors who had purchased American Depository Shares (ADSs) of Petrobras on the New York Stock Exchange filed a securities class action in the Southern District of New York, alleging violations of the Securities Act of 1933, the Securities Exchange Act of 1934 , and (in an amended complaint) Brazilian securities laws.
Refer to the input text as context and select the correct relationship between 'Petrobras' and 'New York Stock Exchange' from the available options.
Options: currency, stock exchange, developer, industry