Sony stock down after industry pressure and a strong dollar
Sony's stock is down 7.22% today, 2.3 percentage points more than industry peer, and fellow Japanese console manufacturer Nintendo. This happens as they've delayed Uncharted 4, their flagship PS4 title, out of the current fiscal year, and their Movies segment is underperforming. While their electronics are finally getting out of a near decade long slump, they are facing increasingly stiff competetion from China, from companies such as Lenovo, Huawei and ZTE, and also of course their South Korean rival, Samsung, who has Sony beat on most electronic products, gaming aside.
Sony's stock was up over 51% in 2015 before it peaked, as it's restructuring efforts were showing fruits. Since then, Sony's stock has decreased gradually, and has almost erased any gain it got. While some of this loss might be because of the negative impact the strong dollar has, reflecting Sony's high ratio of dollar denominated costs, it is bound to make Sony's investors more worried about what's to come.
TL;DR: All companies stocks go up and down, it's how the stock market works. And you can spin anything to be a negative. It's very easy.