Casus nokia

Imagine that Apple introduced iPhone5 (or any other company, any model of a new smartphone) with wireless charging, HD + display, supporting work in gloves and innovative photo and video processing technology, and the next day its shares fell by 17%. Now answer the question, why did this happen with Nokia, and in this case are stock quotes an indicator of the steepness of specific products? Or is it just speculation about the true motives of which you can only build conspiracy concepts?