Fluor, an engineering and construction company, was awarded a $1 billion project to build a coal gasification plant in South Africa. Fluor signed an agreement with a South African client that prohibited them both from announcing the agreement until March 10. Accordingly, Fluor denied all rumors that a major transaction was pending. Between March 3 and March 6, the State Teachers Retirement Board pension fund sold 288,257 shares of Fluor stock. After the contract was announced, the stock price went up. Did Fluor violate Rule 10b-5?