Despite China stock market woes and global economy weaken, U.S. economy stays strong.
Why is that the case ?
The effects of real exchange rate overshooting might be the cause.
With the spillover effects from commodity markets of declining oil prices into international asset markets, the U.S. real exchange rate, as an endogenous variable that is system driven, was altered. To conquer this real shock, the central bank exercised their money supply. With effects of short run expectations and exchange-rate overshooting, U.S. economy responded to the impact with greater magnitude than anticipated. To understand how this works, one would require to employ the Uncovered Interest Rate Parity Model, which is too technical for discussion beyond this point.
There would always be a financial crisis wherever places in this world, and it is up to us to how to survive it and be prepare for what is going to happen.