Stocks are just reaction to latest rumors and changes, no wonder they fell. It doesn't mean anything.
3 Os? What do you mean: 1. symbian? With no future because of outdated structure. And its should be suported till 2016. 2. Maemo? That maemo was not supported is not Elops fault, btw. HE started to develop maemo 6. 3. MeeGo? Forget about this, it was from beginning a shitty idea for nokia to drop maemo and start meego (by the way not Elops decision). Meego is the reason why maemo was dropped and not developed. At the end of the day they stood there with no OS.