Spirit Airlines’ (SAVE) financial stability is challenged by high operating expenses and low liquidity. Elevated labor costs exacerbate the strain on the company's bottom line. Also, low liquidity impedes its ability to meet obligations, in turn making it an unattractive choice for investors’ portfolios.Let’s delve deeper.Southward Earnings Estimate Revision: The Zacks Consensus Estimate for current-quarter earnings has been revised 510.3% downward over the past 90 days. For the current year, the consensus ...