Circuit Breaker & Price Limits
A circuit breaker is an automated regulatory mechanism that temporarily halts all stock trading on NEPSE during extreme market-wide price swings (4%, 5%, and 6%), preventing panic selling and systemic crashes.
Detailed Explanation
To protect investors from herd psychology, speculative stampedes, and algorithmic flash crashes, the Securities Board of Nepal (SEBON) and NEPSE enforce two levels of circuit breakers: Market-Wide Circuit Breakers and Individual Stock Price Bands. Market-wide circuit breakers trigger whenever the benchmark NEPSE Index moves up or down by 4% in the first hour (20-minute halt), 5% before 1:00 PM (40-minute halt), or 6% at any time during the day (trading suspended for the entire remainder of the day). Concurrently, individual company stocks are bound by a strict daily 10% upper and lower price band.
Why It Matters to You
Circuit breakers act as the emergency brakes of the financial system. When shocking news hits (e.g. monetary policy changes, tax policy revisions, or major political crises), human emotion can cause catastrophic market crashes. Circuit breakers force a cooling-off period, allowing market participants to absorb information rationally rather than panic-selling in a blind herd.
Where It Is Commonly Used
- Automated risk management engines of the Nepal Stock Exchange
- Post-budget and monetary policy market trading days in Nepal
- TMS order validation matching systems
- Protecting retail investors from pump-and-dump market cornering
Key Advantages & Limitations
Key Advantages
- Prevents catastrophic market-wide freefalls during sudden geopolitical or economic shocks
- Enforces a psychological cooling-off period, reducing herd-driven emotional panic
- Prevents aggressive market manipulators from artificially cornering stock prices past 10%
- Protects retail investors from executing orders at massively distorted flash prices
Limitations & Risks
- Artificially traps liquidity: when a stock hits 10% Lower Circuit, no buyers exist and you cannot sell
- Delays price discovery: market reality simply rolls over to the next trading day
- Can frustrate disciplined traders attempting to execute rational contrarian positions
- Sudden trading halts freeze pending limit orders inside the TMS system
Common Misconceptions & Beginner Traps
A circuit breaker guarantees that you can sell your stock before it loses more money.
When a stock hits a 10% Lower Circuit, selling pressure is so extreme that there are literally zero buyers in the market. Your sell order will simply sit unfulfilled in the queue.
Individual stock circuits and index circuit breakers use the exact same percentage rules.
Index circuit breakers trigger at 4%, 5%, and 6% of the broad market index with timed halts. Individual stocks are bound by a continuous +/- 10% price band from the previous close.
Index Circuit Breaker vs Individual Stock Price Band
Market-wide trading suspension vs single company +/- 10% daily boundary
| Feature | Index Circuit Breaker | Individual Stock Price Band |
|---|---|---|
| Scope of Impact | Halts all trading across all 250+ listed companies | Applies strictly to that single company; rest of market trades |
| Trigger Thresholds | 4% (20 min), 5% (40 min), 6% (rest of day) | Capped at exact +/- 10.0% of previous day close |
| Trading During Limit | All order matching frozen; zero trading allowed | Trading continues at the 10% ceiling/floor price if counterparty exists |
Upper vs Lower Circuits and the Historic Circuit Days of the NEPSE Bull/Bear Runs
Nepal’s capital market has witnessed memorable circuit breaker sessions. Following favorable monetary policy announcements or political stability milestones, NEPSE has triggered 4%, 5%, and 6% Positive Circuit Breakers within the first two hours of trading, suspending trading for the entire day with millions of buyers and zero sellers! Conversely, during unexpected political crises or aggressive regulatory credit tightenings, the market has crashed 6% within minutes (Negative Circuit), locking sellers. Individual micro-cap stocks with low free-float frequently hit the 10% Upper Circuit repeatedly, underscoring the importance of understanding circuit mechanisms.
- First hour: 4% index change triggers a 20-minute halt.
- Before 1:00 PM: 5% index change triggers a 40-minute halt.
- Anytime: 6% index change closes NEPSE for the entire rest of the day.
- Individual stocks are locked within strict +/- 10% daily price bands.
Real-World Practical Scenario
On a Monday morning following a major pro-market reform, NEPSE opens at 2,000 points. Massive buying surges across all sectors. By 11:45 AM (within the first hour), the index rises by 80 points (+4.0%) to 2,080. NEPSE's automated system instantly triggers the 1st Circuit Breaker, halting all TMS trading for 20 minutes. Trading resumes at 12:05 PM, but buying momentum continues. By 12:40 PM (before 1:00 PM), the index touches 2,100 (+5.0%), triggering the 2nd Circuit Breaker for 40 minutes. When trading resumes at 1:20 PM, a further surge pushes the index to 2,120 (+6.0%). The 3rd Circuit Breaker fires immediately, shutting down NEPSE for the remainder of Monday.
Circuit breakers provide vital pauses during extreme market mania or panic, allowing you to reflect objectively rather than making reckless trades.
Key Takeaways & Summary
- A circuit breaker temporarily or permanently suspends NEPSE trading during extreme index fluctuations.
- Market halts trigger at 4% (20 min in 1st hr), 5% (40 min before 1 PM), and 6% (closed for rest of day).
- Individual stocks are bound by a strict daily +/- 10% price band from the previous close.
- Circuit breakers enforce psychological cooling periods to prevent herd panic and systemic market crashes.
Where You’ve Seen This Term
This concept is actively referenced across the following RisePaisa lessons, guides, and interactive tools: