One of the interesting phenomena is that this boom is more specific to US and if you go in rest of the world people will often tell you how their economy sucks

One of the interesting phenomena is that this boom is more specific to US and if you go in rest of the world people will often tell you how their economy sucks and things are in in down trend. In US, the stock prices have indeed grown in same order as earnings which is surprising because how are all these companies magically show such huge growth for almost a decade now but elsewhere this is not the case. One possibility is that lots of US growth come from winning market share abroad.