It looks like Nokia's big event yesterday where it launched its new Lumia Windows smartphones didn't exactly have the desired effect, with shares tumbling 13 percent on the Helsinki Stock Exchange and 16 percent in New York. The top of the range Lumia 920, in particular, was seen as the company's last stab at regaining former glories in the face of huge competition from Apple and Samsung. According to reports from Reuters, investors were left unimpressed saying it lacked the 'wow' factor they were hoping to see. Nokia's reticence about dates, prices or carrier partners was also seen as a major negative. Nokia shares traded in Helsinki reportedly began slipping half way through the New York launch event and ended the day down 13 percent at 1.99 euros.