CIRCUIT BREAKERS: 7%, 13% and 20% circuit breakers in US cash equities were established in wake of the 1987 Black Monday Crash

S&P 500:

During non-US trading hours (Futures) – Hard upside or downside limit of 5% from 1800EDT/2200GMT to 0930EDT/1330GMT.

• Midpoint of the limit is based on the futures fixing price
• Width of limit is based on index value at 1600EDT/2000GMT

During US trading hours (Cash)

• 7% fall to 2764.30 before 15:25EDT/19:25GMT will prompt a 15-minute pause.
• 13% drop before said time to 2585.96 will introduce another 15-minute pause.
• A fall of 20% to 2377.90 within the time will shut the markets

NOTE: Only the 20% rule applies to the final 35 minutes of trading.

NASDAQ: Nasdaq futures will stop falling if the contract reaches 8093.25.

DOW JONES: DJ contracts will stop falling if the contract trades below 24534