investors have short attention spans and are as fickle as rabbits - news of war will dampen some stocks while boosting others - example Lockheed Martin (LMT) is up today on the news and it's not surprising as they are the primary hammer of the military and stand to benefit from such an action. Diversification and dollar cost averaging should pull us through this lull - stick with the basics and dont caught up in day to day activity.
I agree, these investors have very little attention spans. The market hasn't really had any real down turn though for decades. Despite the threats made earlier today gold and silver have moved very little so I don't think anyone expects much to happen in terms of war just yet.