In case of China stock market sell offs, world economy growth slow down (except US) and unstable geopolitical situation in North Korea, Syria, Ukraine, Turkey and others are filled with fear and insecurity. This cause the money flow into more secure assets. And it is hard to say when those unstable factors will fade away. SP US stock index reached end of the impulse pattern 3 and now is in the corrective pattern with in the wave 4. The strong close support level is at 1800 price level in confluence with Fibonacci 23.6%.
For more detailed and more frequent ideas, reviews and analysis you can contact me here, on facebook or website. Best wishes for new incoming trading year! ;)