Stockmarket returns and the Chinese zodiac

The Economist just published a statistic that links the stock market returns (America's Dow Jones Industrial Average price index) to the twelves Chinese zodiac. Apparently over the last 110 years, Dragon years had shown an average increase of 7.7 percents, scoring high at the second place after Rabbit. Dragon is always seen as strong and prosperous animal among the Chinese culture, I don't know if the stock market will surge, but what I'm certain is that the Chinese couples will be working hard to produce Dragon babies. This has always given problems to educators as when the Dragon babies are at age to go to school, they explode the available places / resources!

Happy Dragon Year!