"Crises in
financial markets affect humans worldwide. Detailed market data on trading
decisions reflect some of the complex human behavior that has led to these
crises. We suggest that massive new data sources resulting from human
interaction with the Internet may offer a new perspective on the behavior of
market participants in periods of large market movements. By analyzing changes
in Google query volumes for search terms related to finance, we find patterns
that may be interpreted as “early warning signs” of stock market moves. Our
results illustrate the potential that combining extensive behavioral data sets
offers for a better understanding of collective human behavior."
http://www.nature.com/srep/ 2013/130425/srep01684/full/ srep01684.html
http://www.nature.com/srep/