Boeing shares slipped slightly Tuesday after Ethiopian Airlines placed an order for nine 787-9 Dreamliners and finalized the purchase of 11 737 MAX jets, the companies confirmed. The stock traded around $247.13 in the afternoon, down about 0.2%, after fluctuating between $240.08 and $248.43. Ethiopian Airlines Group CEO Mesfin Tasew said, “We will continue to acquire more aircraft and adopt the latest technologies as part of our strategic vision to advance sustainable aviation.”