Domestic looking a bit weaker after a large increase in capacity not entirely matched by demand, through upguaging of aircraft. As the domestic yields are slightly up and not down doubt it is much of a concern.
AIR is an airline and susceptible to many of the world's problems. Plane crashes, war, disease outbreaks etc.
The warning signs of the price getting a bit toppy were on this thread, with lots of new posters appearing. Both of the flighty and first time poster kinds.