Some very interesting news about GTAT from the WSJ. http://online.wsj.com/articles/shattered-screen-dreams-at-gt-advanced-heard-on-the-street-1412714363 Obviously this must have a lot to do with the recent GTAT bankruptcy fallout. On the one hand, AAPL withholding payments is a huge loss of revenue for the GTAT, who probably did not have very many customers. Such a hit in revenue would cause them to file Chapter 11. But I feel like they were in trouble even before AAPL decided to do this. My guess is that there was some sort of supply constraint issue. Apple wanted sapphire, and they agreed to loan GT $578M to jumpstart production. But they couldn't deliver. The fact that they were $125M below the trigger point seems like Apple really had faith in them but ultimately they could not keep up with their demands. If I were Apple, I would try to acquire them in bankruptcy while they're on the cheap.