Where Circuit Breakers Kick In Today
The S&P 500 has three circuit-breaker levels that halt trading in an indiscriminate selloff. The first is down 7%.
The S&P 500 was halted Sunday night after declining 7% at the open, but is hitting new lows. So-called circuit-breaker levels are the thresholds at which exchanges halt or close marketwide trading due to extreme declines. These levels are calculated daily, based on the previous day’s close in the S&P 500.
As the wild swings on Wall Street continue, here are the levels to watch for further trading curbs when U.S. markets open Monday.
Level One Breach
A 7% decline in the S&P 500 from the prior day’s close would trigger a level one breach, where trading is halted for 15 minutes.
That level for regular trading on Monday is 2764.30, a 208 point drop from Friday’s close of 2972.37.
If that level is reached at or after 3:25 p.m. ET, it would not halt marketwide trading.
Sunday night, futures on the S&P 500 tumbled as low as 2818.75, triggering a trading curb because the threshold for premarket and after-hours trading is lower than during the regular session.
The next threshold is 13%. A decline in the S&P 500 by that much would similarly result in a 15-minute halt.
To trigger a level-two circuit breaker Monday, the index would have to drop 386 points to 2585.96. Trading wouldn’t be interrupted if the drop came at or after 3:25 p.m.
It takes a 20% drop in the S&P 500 to trigger a level-three circuit breaker. If this happens at any point in the trading day, marketwide trading is halted for the remainder of the day.
To hit level three on Monday, the S&P 500 would need to fall 594 points to 2,377.90.
A different rule covers single stocks, for which the Securities and Exchange Commission has price bands set by tier (Tier One covers members of the S&P 500, Russell 1000 and some exchange-traded products, while Tier Two covers other securities) and by price. Those levels can be found here.
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