Aug 1, 2026 · 10 min · 9 segments
**🎙️ Episode 60: Circuit Breakers Explained – The Emergency Brake of the Nigerian Stock Market** **What happens when the Nigerian stock market suddenly stops trading?** Your trading app freezes…
This is what we do here at the Nigerian Investor Podcast, basic investors education.
The Nigerian Exchange keeps an eye on something called the All Share Index, or ASI, throughout the trading day.
Think of the ASI as a scorecard for the entire stock market.
It shows whether the market as a whole is going up or down.
Under Rule 15.46, a circuit breaker is triggered when the ASI rises or falls by 5% compared with the previous day's closing level.
But there is one more important detail.
This 5% movement must happen within a specific period during the trading day.
Under the previous trading hours, the circuit breaker could only be triggered if the 5% threshold was reached between 10:45 a.m. and 1:45 p.m.
If the markets moved outside that window, the circuit breaker would not be activated.
However, with the introduction of the extended trading hours this year, from 9:00 a.m. to 4:00 p.m., the monitoring window has also been adjusted.
Now, the circuit breaker can be triggered between 10:15 a.m. and 3:30 p.m.
If the market moves too early or too late, the circuit breaker may not activate.
Once this 5% threshold is reached within that period, trading across the entire market is automatically paused for 30 minutes.
No buying, no selling.
No trades are executed.
Everything pauses.
Think of it as pressing the pause button instead of the stop button.
The market isn't closing for the day.
It is simply taking a short break.
This is what we do here at the Nigerian Investor Podcast, basic investors education.
The Nigerian Exchange keeps an eye on something called the All Share Index, or ASI, throughout the trading day.
Think of the ASI as a scorecard for the entire stock market.
It shows whether the market as a whole is going up or down.
Under Rule 15.46, a circuit breaker is triggered when the ASI rises or falls by 5% compared with the previous day's closing level.
But there is one more important detail.
This 5% movement must happen within a specific period during the trading day.
Under the previous trading hours, the circuit breaker could only be triggered if the 5% threshold was reached between 10:45 a.m. and 1:45 p.m.
If the markets moved outside that window, the circuit breaker would not be activated.
However, with the introduction of the extended trading hours this year, from 9:00 a.m. to 4:00 p.m., the monitoring window has also been adjusted.
Now, the circuit breaker can be triggered between 10:15 a.m. and 3:30 p.m.
If the market moves too early or too late, the circuit breaker may not activate.
Once this 5% threshold is reached within that period, trading across the entire market is automatically paused for 30 minutes.
No buying, no selling.
No trades are executed.
Everything pauses.
Think of it as pressing the pause button instead of the stop button.
The market isn't closing for the day.
It is simply taking a short break.
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