London (CNN Business) 1. Boeing crash raises questions: Shares in Boeing (BA) were poised to open sharply lower in New York after the second crash of a 737 MAX 8 in less than five months.

All 157 people on board a 737 MAX 8 operated by Ethiopian Airlines were killed when the plane crashed shortly after takeoff on Sunday. In October, a 737 MAX 8 flown by Lion Air went down off the coast of Indonesia.

Both the Ethiopian Airlines and Lion Air planes were brand-new aircraft. And both went down minutes into flight.

The crashes could result in major consequences for Boeing's 737 MAX 8 program and tarnish the US company's reputation for safety. Boeing stock was down 9% in premarket trade.

The Boeing 737 has been a workhorse on short- and medium-haul flights for decades. The 737 MAX is the latest version — and the company's bestselling aircraft by far. Airlines have ordered thousands of them.