Yahoo Finance has reported that Frontier Airlines stock jumped by roughly 15% on Tuesday, September 3, its best day in more than five months, after Spirit Airlines filed for Chapter 11 bankruptcy for the second time in under a year. Investors reacted positively to the news, and Deutsche Bank upgraded Frontier from “hold” to “ buy ,” with many noting the strong competitive position that Frontier now finds itself in.

Spirit’s renewed financial collapse came after a failed reorganization attempt earlier this year and its inability to fatten margins amid high debt and leasing costs. During the filing announcement, Spirit said it planned to reduce its fleet and route coverage, a move expected to loosen competition. This also comes as Frontier plans a major winter expansion, much of w

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