The share price has nothing to do with what's really going on in a company's financials. They're just pieces of paper that don't even provide companies with any benefits. These short-term market swings are just the market's preconception of what's going on at a superficial level.
People may be buying back Apple stock, and Apple's stock price has gone up ~8% since the iPhone 7's release. However, the real picture is this:
http://www.zerohedge.com/news/2016-09-16/here-are-lines-people-waiting-new-iphone-7
Barely anyone waiting outside of stores for the iPhone 7.
If you didn't care about the share price of either Samsung or Apple, why did you use "Wall Street Not Impressed with iPhone 7, Apple shares fall 3%" as the title of your thread then?