Could tariffs trigger a stock market circuit breaker? Watch this level.

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The Tell

Circuit breakers were built into the fabric of the stock market to prevent panic selling

Published: April 3, 2025 at 12:28 p.m. ET

Stocks were falling in response to President Donald Trump’s sweeping tariff announcement Wednesday after market hours. The S&P 500 index SPX opened 3.2% lower on Thursday, and continued to decline in early trading.

With the S&P 500 facing its largest percentage drop since 2022, traders were wondering if the quick decline would trigger a circuit breaker.

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