Bombardier Tumbles Most Ever on Sales Warning, A220 Charge Risk

Bombardier Inc. fell the most on record after warning of disappointing fourth-quarter sales and revealing that it may exit a joint venture with Airbus SE that makes the A220 jetliner and potentially take a major writedown.

A ramp-up in A220 production will require additional cash investment, pushing back the break-even point and generating lower returns across the lifetime of the project, Bombardier said in a statement Thursday. The value of the A220 joint venture is likely to be diminished and the amount of any accounting charge will be disclosed with full 2019 results next month, the company said.

The ...