The U.S. Securities and Exchange Commission and the Commerce Department are investigating Boeing Co.’s relationship with a satellite startup backed by a Chinese government-owned firm, following an article by The Wall Street Journal on the matterIn a letter to the Los Angeles-based startup Global IP, the SEC requested that the company retain all documents about its work with Boeing and a number of other individuals and entities, including state-owned Chinese lender China Orient Asset Management Co. The letter said the SEC believes the Los Angeles company possesses “documents and data that are relevant to a matter under investigation,” and asked...