By Bret Kenwell Spirit Airlines stock is trading lower on worries it will accept a lower takeover bid. Here’s how to approach the situation now. When we talk about airlines, Spirit Airlines (SAVE) – Get Spirit Airlines Inc. Report does not usually dominate the headlines. Lately though, that’s been the case given the ongoing bidding war for the company. Frontier Group (ULCC) – Get Frontier Group Holdings Inc. Report is vying to acquire Spirit Airlines, but so is JetBlue (JBLU) – Get JetBlue Airways Corporation Report. Shares were slumping more than 8% on Friday as it appears the company is favo…