Willie, most of Boeing's stock drop has been in the last month - after Boeing announced a big write-down on the 747-8 program, along with a general stock market slump. It spent most of 2015 near it's record high. There could be some unpleasant surprises in flight test, but so far the Max program is
ahead of schedule. Contrast that with Bombardier which recently became a "penny stock".
This doesn't exactly paint a rosy picture for the future either:
Why Bombardier Is Struggling to Build Bigger Planes - Bloomberg Business
Nearly a decade in, the C Series program has yet to gain traction and the company is in tatters. Bombardier is a penny stock, it’s burning cash and has gone cap in hand to the Canadian government for as much as $1 billion in aid to stay afloat. At stake is the survival of a 73-year-old plane and train maker that employs 24,000 people in Canada and contributes C$6.5 billion ($4.7 billion) to the Quebec economy alone.