Company's best selling airplane, Boeing 737 MAX has been grounded since March 2019 due to safety concerns. (2 plane crashes in succession).Although 737 MAX forms an important part of company's airplane fleet, losses due to its grounding have not affected its valuation when looked through the PE ratio.This appears to be on account of -
a. Superior EBT margins of Airbus.
b. Clarification by Boeing's management of solving the 737 MAX issue by Q4FY19.