Who said anything about stock price? The numbers he quotes are MARKET SHARE!
The customers are determining who has the superior product and who has the inferior one. AMD is unable to give away APUs in the face of Ivy Bridge. It can't push Opterons in the face of Romley and can't push Radeons in the face of Kepler. AMD is losing market share to Intel and nVidia every single quarter in every market where they compete.
AMD's products are in low demand. It means they are inferior to alternatives that are favored by users and consumers.
Amds products are good. I have seen a lot of misinformation on amds products. Especially what amd claimed in performance for bulldozer some how some reviewer who must of had an agenda claimed that bulldozers performance was more than what amd said. Dominhaiber comes to mind. If you want to talk about inferior products look at Intels garbage integrated graphics and #$%$ poor opencl support.