Effective October 12, 2020: Overnight limits will expand from +/- 5% price limit to +/- 7% limit plus 3.5% dynamic circuit breaker. During US market hours, S&P 500 products will re-open following a market-wide circuit breaker trading halt 10 minutes after the halt is instituted. For details, please see the Frequently Asked Questions for the amended Price Limits effective October 12.
Theoretical 400+ point range based on present prices.