it's the ceo's job to maximize the share price. he makes more money if the price goes higher since he owns lots of stocks. the 60 million buyback money is not his. you need to educate yourself more.
hope you didn't miss it. same thing happened during the day the iphone 5s debuted. long lines everywhere and the stock price kept dropping. it went up 5% over the weekend after 10 million sold.
those batteries packs a lot of energy in a tiny space. apple had their share of problems with them earlier this year.