There are correction mood on stock markets, so I prefer wait and see approach. But doing nothing is very boring and I have decided to look in the price history of Hang Seng Index and compare it with S&P500. My broker, Whotrades by the way, was kind enough to provide me with the chart from Reuters above. It turns out that HSI outperforms S&P 500 10 times during last 50 years. I really was very surprised, I have not expected so huge difference in results.