Does emotion operate at a societal level? Does mood influence the way in which we collectively make decisions? It would seem so. There’s all sorts of stuff out there now on ‘sentiment tracking’ and whether it’s linked to measures of economic activity like the stock market. Well, interestingly, it seems that global emotion and mood, as measured via something like Twitter, does predict stock market activity. Indeed trading seems to lag behind positive or negative Tweeting! Or, if you’re using the fancy stuff, tweets analysed in terms of the Google Profile of Mood States (Calm, Alert, Sure, Vital, Kind and Happy). And no, I’m not making this stuff up. And yes, you’re right, there’s money to be made here!
Read one of the original papers at: http://www.battleofthequants.com/Research/sdarticle.pdf
Also, if you’re quick, you can listen to this BBC Radio 4 programme on the topic: Word of Mouth: Counting Word Incidences