On technical basis, SPY (The S&P500 ETF) has broken down below 1st standard deviation from quarterly mean (66 days), while also breaking below 1 year mean (264 days).
The price has now entered a downtrend on quarterly basis, and will continue to fall if price stays below 1st standard deviation from quarterly mean (207.1) Closest target is the lower 1st st deviation from 1 year mean (197.70)
After the target is tagged, price will likely stay within 1st standard deviation from 1 year mean for some time (range will be 197.7 - 212.5)
SPY is mostly influenced by upcoming September uncertainty, caused by upcoming US policy decision in regard to Iran (to leave it sanctioned or to open it up).