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Topic
Circuit breakers
4 guides in Finabase Learn
- Black Monday 1987: the 22.6% crash and why circuit breakers exist What happened on October 19, 1987, how portfolio insurance and broken market links deepened the fall, how the Fed responded, and how circuit breakers followed.
- How crypto markets differ from stocks: hours, venues and volatility Why crypto trades 24/7 on fragmented venues with no market-wide halts, how its volatility compares with SPY in a year of daily data, and what spot ETFs changed.
- Market-wide circuit breakers: the 7%, 13% and 20% halt rules How US stock market circuit breakers work: the three S&P 500 trigger levels, the 3:25 p.m. rule, the four March 2020 halts, and the history back to 1987.
- The COVID crash of 2020: the fastest bear market and recovery How the S&P 500 fell 34% in 33 days in February–March 2020, the four circuit-breaker halts, the Fed and CARES Act response, and the record set by August 2020.
Educational content, not investment advice. Finabase Learn explains how markets and tools work. It does not recommend any security or strategy, and examples are for illustration only. Investing involves risk, including the loss of principal. Rules and figures are for the United States unless stated and can change — check the cited source before you act.