The downward trend in SAVE stock probably has more to do with a negatively trending outlook (still overall positive). Lower RASMs.
From the Q2 '15 Earnings
For the second quarter 2015, Spirit’s total operating revenue was $553.4 million, an increase of 10.8 percent compared to the second quarter 2014, driven by an increase in flight volume, partially offset by a decrease in operating yields.
Total revenue per passenger flight segment (“PFS”) for the second quarter 2015 decreased 12.4 percent year over year to $122.59, primarily driven by a 19.4 percent decrease in ticket revenue per PFS. The decline in ticket revenue per PFS was driven by lower fare levels as a result of increased competitive pressures as well as a higher percentage of the Company’s markets being under development compared to the same period last year. Although slightly lower year over year on a per PFS basis, non-ticket revenue continues to provide a stable revenue stream that is increasingly important during periods of lower passenger yields. Non-ticket revenue per PFS only declined 1.7 percent year over year to $54.24. The decrease in non-ticket revenue per PFS was primarily attributable to lower bag revenue per PFS and the outsourcing of the Company’s onboard catering to a third-party provider under a revenue share agreement.
Total revenue per available seat mile (“RASM”) for the second quarter 2015 decreased 14.8 percent compared to the second quarter 2014 on a capacity increase of 30.1 percent. The RASM decrease was driven by lower fare levels as a result of increased competitive pressures as well as the ramp up growth in the Company’s new and mature markets.