There was never a bubble in history with a population of this size which means comparing to it tullips, japan or the US is a little silly. There is a LOT of greater fools in china in line to buy at higher prices, so short-term speculations there make sense. I could be wrong and this thing could pop tomorrow but I do believe that a bubble with a country running at 10% a year and with a pop this size(even taking out the poor masses and the people who can afford stock trading is increasing everyday) is different from others and the game can play for longer than expected. I wish I could daytrade their indexes.