Beware Wind!

Inspired by Stefan's post today, I recall the following paper It describes that studies have found evidence that wind speed has strong influence on mood and consequently effect in stock returns. 

All extracted from data of wind speed and daily stock market returns across 18 European countries from 1994 to 2004. The authors claim: our findings contradict the rational asset-pricing hypothesis ...

This was a joke? - or weather forecasters would have become immensely rich and had published fake forecasts to avoid sharing.