Random Thought:

"When will the 1st alarm ring?"

7% decline

If the S&P 500 falls 7% from the previous session’s close before 3:25 p.m. Eastern, all stock-market trading halts for 15 minutes.

https://www.marketwatch.com/story/heres-what-it-takes-to-trigger-stock-market-circuit-breakers-2015-08-24