Just an idea, but this is the idea that I purchased this stock and some Calls based on.
When Southwest hit $10.00 per share some (or many) stop losses were triggered. My idea is that many mutual funds have Southwest in them, there are also many that needed to dump Southwest as soon as or soon after it went below $10. Mix this in with a bunch of fear/panic in the markets last week and you have a large supply of shares to work through. If I am correct then we should be past that bump in the road.