By Martin Baccardax Ford shares have fallen more than 20% over the past ten days as investors weigh supply-chain disruptions against consumer demand ahead of its fourth quarter earnings. Ford Motor Co. (F) – Get Ford Motor Company Report shares slumped lower Monday after the carmaker said it would stop taking retail orders for the Maverick amid a production backlog for the newly-unveiled hybrid pickup. Ford said customers can still buy the $20,000 Maverick on dealer lots, but it won’t take new retail orders for the truck until later in the summer as it focuses on fulfilling existing demand. Th…