Orsaken till uppgången, det fina marsvädret.

Nu har jag hittat orsaken till den kraftiga uppgången vi har i nu. Det är såklart SOLEN (vilket jag alltid trott). Bevis får jag genom en artikel i Journal of Finance:

Good day sunshine: Stock returns and the weather

David Hirshleifer, Tyler Shumway. The Journal of Finance. Cambridge: Jun 2003.Vol.58, Iss. 3; pg. 1009, 54 pgs

Psychological evidence and casual intuition predict that sunny weather is associated with upbeat mood. This paper examines the relationship between morning sunshine in the city of a country's leading stock exchange and daily market index returns across 26 countries from 1982 to 1997. Sunshine is strongly significantly correlated with stock returns. After controlling for sunshine, rain and snow are unrelated to returns. Substantial use of weather-based strategies was optimal for a trader with very low transaction costs. However, because these strategies involve frequent trades, fairly modest costs eliminate the gains. These findings are difficult to reconcile with fully rational price setting.