Philadelphia Stock Exchange (PHLX) cleared a legal hurdle in its quest to combine with another exchange when it settled a class action suit on behalf of minority members on 20 June.The exchange has reached an agreement in principle in the suit led by PHLX member Chuck Ginsburg against the exchange on behalf of roughly 300 PHLX shareholders. Ginsburg challenged PHLX’s decision in 2005 to sell 90% of the exchange to six large brokers...