Circuit Breakers in Indian Markets

Definition of Circuit Breakers

Circuit breakers are regulatory measures implemented by stock exchanges to temporarily halt trading when there is a significant movement in the index values. These measures are designed to prevent panic selling or buying, giving investors a chance to digest information and make informed decisions.

How Circuit Breakers Work in Indian Markets

In India, both the National Stock Exchange (NSE) and Bombay Stock Exchange (BSE) have circuit breaker systems in place as per the guidelines of the Securities and Exchange Board of India (SEBI). These systems are triggered by movements in major indices like the Nifty 50 and S&P BSE Sensex. Circuit breakers can be triggered at three stages of the index movement, typically at 10%, 15%, and 20%, resulting in different durations of trading halts.

Market-Wide Circuit Breaker Levels and Halt Times

The market-wide circuit breaker (MWCB) watches two indices, the Nifty 50 and the Sensex. If either one falls or rises by 10, 15 or 20 percent from its previous day's close, trading stops across the whole market. Whichever index hits the level first triggers it. The limits are worked out afresh each day from the previous close. How long the halt lasts depends on the time of day when the level is hit.

The older table on this page showing 45 minutes for 10 percent and 1 hour 45 minutes for 15 percent applies only when the level is hit before 1:00 pm. Later in the day the halts are shorter, and near the close a 10 percent move causes no halt.

The system began on 2 July 2001 under a SEBI circular dated 28 June 2001. SEBI's circular CIR/MRD/DP/25/2013 of 3 September 2013 changed it so that limits are calculated daily from the previous close, and added a 15-minute pre-open session after each halt.

Worked Example of Circuit Breaker in Action

Consider a scenario where the Nifty 50 index falls by 10% from its previous close. This triggers the first level of circuit breaker, leading to a trading halt for a specific period, usually 45 minutes. If the index continues to fall and reaches the second trigger of 15%, another halt is activated, lasting for an hour and 45 minutes. If the decline reaches 20%, trading is suspended for the remainder of the day.

• Level 1: 10% movement before 1:00 pm, 45-minute halt (15 minutes from 1:00 pm to before 2:30 pm, none from 2:30 pm).
• Level 2: 15% movement before 1:00 pm, 1-hour 45-minute halt (45 minutes from 1:00 pm to before 2:00 pm, rest of the day after that).
• Level 3: 20% movement, trading suspended for the day.

Purpose of Circuit Breakers

The primary purpose of circuit breakers is to manage excessive volatility in the stock markets. Sudden and large movements in stock prices can lead to irrational decisions by traders. By implementing a halt in trading, circuit breakers provide a 'cooling-off' period for investors and traders to process information and make rational decisions. This helps to stabilize the market and prevent a potential crash due to panic selling.

SEBI's Role in Circuit Breakers

The Securities and Exchange Board of India (SEBI) is the regulatory authority responsible for overseeing the effective implementation of circuit breakers in Indian markets. SEBI ensures that both NSE and BSE adhere to the guidelines set forth for circuit breakers, thereby maintaining the integrity and stability of the financial markets. The framework has been revised from time to time. For example, SEBI's circular CIR/MRD/DP/25/2013 of 3 September 2013 introduced daily limits based on the previous close and a 15-minute pre-open session after each halt.

How Trading Restarts: The Pre-Open Call Auction

When a halt ends, the market does not simply switch back on. It reopens through a 15-minute pre-open call auction. In a call auction, orders are collected during the window and then matched together at a single price, usually the price at which the largest quantity can trade. That avoids a chaotic first print.

For you this means three things. No orders match while trading is halted, so a stop-loss order cannot execute during the halt. After the reopening the market may open well away from the last price you saw. Ask your broker how open orders are treated at the reopening, because practice can differ, and do not assume your trigger will fill near its level.

Common Mistakes by Traders

One common mistake traders make is misunderstanding the purpose of circuit breakers. Some traders view them as a hindrance to trading activities rather than a protective measure. Additionally, traders may not be aware of the exact trigger points and durations of trading halts, leading to misinformed trading decisions. It is crucial for traders to stay informed about the current circuit breaker levels and updates from SEBI.

Practical Tips for Traders

Recent Changes in Circuit Breaker Mechanisms

In recent years, SEBI has made several changes to the circuit breaker mechanisms to accommodate evolving market conditions. The three levels of 10, 15 and 20 percent date from the system's start in 2001. The 2013 revision changed how limits are calculated and added the pre-open session after a halt. These changes aim to provide better protection for investors and ensure smoother market operations. Traders should regularly check for updates from SEBI to stay informed about any changes that could impact their trading activities.

Impact of Circuit Breakers on Market Participants

Circuit breakers impact various market participants differently. For retail investors, they provide a safety net against sudden market crashes. Institutional investors, on the other hand, might find these halts disruptive to their trading strategies. However, the overall consensus is that circuit breakers contribute to market stability, benefiting all participants in the long run by reducing systemic risks.

Historical Instances of Circuit Breakers in India

Examining historical instances of circuit breakers in India's stock markets provides valuable insight into how these mechanisms function in practice. Over the years, the National Stock Exchange (NSE) and the Bombay Stock Exchange (BSE) have experienced several significant market events that triggered circuit breakers. A halt in May 2009 was the last market-wide halt before March 2020, according to Business Standard. In March 2020 the COVID-19 sell-off triggered the 10% circuit breaker on 13 March and again on 23 March.

These historical triggers of circuit breakers have been instrumental in maintaining market order and protecting investors from abrupt losses. By temporarily halting trading, circuit breakers provide a cooling-off period for investors to assimilate information and make informed decisions, rather than reacting impulsively to market fluctuations. These events have also led to regulatory reviews and adjustments to circuit breaker thresholds by the Securities and Exchange Board of India (SEBI) to better address future market volatility. Understanding these historical instances helps traders anticipate how similar situations might unfold, thereby enhancing their strategic planning.

• May 2009: a market-wide halt; in March 2020 Business Standard reported the 13 March lower circuit as the first since May 2009.
• COVID-19 Pandemic March 2020: market-wide halts on 13 March and 23 March.
• SEBI's adjustments following these events.

Case Study: The March 2020 Halt

On 13 March 2020, global markets were falling fast during the early COVID-19 sell-off. Business Standard reported that the Nifty fell 10.07 percent, or 966 points, to 8,625 in early trade, and trading was halted for 45 minutes at about 9:20 am. Reports described it as the first such halt in India in about 12 years. Normal trading restarted at 10:20 am after the pre-open session. Business Today reported that by 10:55 am the Sensex was down only about 110 points at 32,667, far from its low.

A second halt came on 23 March 2020, when the Nifty fell 824 points to 7,903 and the Sensex fell 2,991 points to 26,924, according to the same reporting.

• Traders with open futures and short option positions could not exit during the 45 minutes, and stop-loss orders could not run.
• Margin requirements and gap risk were the real danger: the market could reopen far from the last price.
• A trader who had position size set for a normal day may have faced a loss larger than planned. Sizing for gaps, not only for stops, is the lesson.

Numbers here come from news reports of those days. They are examples of how a halt looked, not a forecast of when the next one may come.

Comparison with International Circuit Breaker Practices

Circuit breakers are not unique to Indian markets; they are a common feature in stock exchanges worldwide. Understanding how circuit breakers in India compare with those in other countries can help traders appreciate their effectiveness and limitations. In the United States, for example, the New York Stock Exchange (NYSE) employs a tiered system of circuit breakers based on percentage declines in the S&P 500 Index. These thresholds are more granular compared to Indian markets, which typically use broader market indices like the Nifty 50 and the Sensex to determine circuit breaker triggers.

Despite these differences, the underlying purpose of circuit breakers remains consistent globally: to prevent panic selling and maintain orderly market conditions. However, international practices can offer lessons for Indian regulators and market participants. For instance, the use of more sophisticated data analytics and real-time monitoring in foreign markets can be adopted to enhance the efficiency of circuit breakers in India. By drawing comparisons with international practices, Indian traders can gain a broader perspective on market stability mechanisms.

• US NYSE: Tiered system based on S&P 500.
• Granularity of thresholds in international markets.
• Potential lessons for Indian market enhancements.

Technological Advancements in Circuit Breaker Systems

Technological advancements have significantly improved the implementation and monitoring of circuit breakers in stock markets. In India, exchanges like NSE and BSE have been leveraging technology to ensure the efficient execution of circuit breakers. The integration of advanced algorithms and data analytics allows for the real-time assessment of market conditions, enabling faster response times to market movements. This technological evolution ensures that circuit breakers can be triggered more accurately, reducing the risk of erroneous halts and ensuring market continuity.

Moreover, the use of high-frequency trading platforms and machine learning tools can further refine the sensitivity and effectiveness of circuit breaker mechanisms. These technologies provide a robust infrastructure that can handle large volumes of trading data swiftly, facilitating seamless execution of market halts when necessary. For traders, understanding the role of technology in circuit breaker systems is crucial, as it impacts the speed and reliability of trading operations. Staying informed about technological trends can help traders adapt their strategies to align with evolving market frameworks.

• Integration of advanced algorithms.
• Real-time assessment of market conditions.
• High-frequency trading and machine learning applications.

Psychological Impact of Circuit Breakers on Traders

Circuit breakers are mechanisms designed to curb excessive volatility in stock markets by temporarily halting trading when prices move too rapidly in either direction. While their technical function is well understood, the psychological impact on traders is an equally important aspect. Circuit breakers can provide a cooling-off period that allows traders to reassess their strategies and make more informed decisions. This break can help reduce panic-driven decisions and bring some level of rationality back to the market. For many traders, especially those who are new or have significant exposure, the activation of circuit breakers can be a moment of relief as it halts the spiral of losses and allows time for reflection.

On the other hand, circuit breakers can also induce anxiety or uncertainty among traders who are unsure of how the market will react once trading resumes. This uncertainty can lead to increased volatility immediately after the circuit breaker is lifted, as traders rush to adjust their positions. The psychological impact varies across different types of traders. Institutional traders might have more sophisticated risk management strategies in place, whereas retail traders may experience heightened emotional responses. Understanding these psychological effects can help traders better prepare for the eventual resumption of trading, making circuit breakers a crucial part of risk management strategies.

• Circuit breakers create a cooling-off period, allowing for reassessment.
• They can reduce panic-driven decisions and promote rationality.
• Anxiety may increase due to uncertainty when trading resumes.
• Institutional traders might manage risks better than retail traders.

Do Circuit Breakers Actually Stop the Market From Falling?

Experts disagree, and this page does not claim a result. The case for halts is that a pause gives people time to read the news, lets margins and funding be arranged, and stops a spiral where falling prices force more selling.

The case against is the so-called magnet effect. As prices near a trigger level, some traders sell early to avoid being locked in, which can speed up the fall toward the level. Others argue a halt only delays selling to the reopening. In March 2020 the market recovered part of the day's fall soon after the reopening, but one day proves little. Treat a circuit breaker as a safety rule, not a guarantee.

Regulatory Framework Governing Circuit Breakers

The regulatory framework governing circuit breakers in India is a critical factor in maintaining market stability. The Securities and Exchange Board of India (SEBI) plays a pivotal role in setting these regulations. Circuit breakers are part of a broader set of market surveillance measures aimed at protecting investors and ensuring fair trading practices. SEBI's rules determine the threshold levels for index movements that trigger a circuit breaker. These thresholds are based on the previous day's closing value of key indices like Nifty and Sensex.

The framework is designed to be dynamic, allowing SEBI to adjust thresholds as market conditions change. This adaptability is crucial for responding to varying levels of market volatility. In addition to setting thresholds, SEBI also outlines the duration of trading halts, which vary depending on the magnitude of the index movement. For instance, a 15% movement before 1:00 pm leads to a longer halt (1 hour 45 minutes) than a 10% movement (45 minutes). This regulatory oversight ensures that circuit breakers are effectively used to stabilize markets without unduly hindering market activity.

• SEBI sets threshold levels for triggering circuit breakers.
• Thresholds are based on previous day's closing values of indices.
• Regulations include dynamic adjustments to thresholds as needed.
• SEBI outlines specific durations for trading halts based on movement size.

Market-Wide Breaker vs Stock Price Bands vs F&O Price Bands

People use the words circuit breaker for three different things.

The stock-level rule comes from the NSE circular NSE/FAOP/64995 of 8 November 2024, effective 18 November 2024, which dealt with sliding price bands. A stock hitting its band stops trading in that stock only, while the market-wide breaker stops everything. See also circuit limits explained and the upper circuit and lower circuit pages.

Role of Circuit Breakers in Risk Management Strategies

Circuit breakers play an essential role in risk management strategies for both individual and institutional traders. For individual traders, understanding circuit breakers can be a key component of managing portfolio risk. By knowing when these mechanisms are likely to be triggered, traders can adjust their positions accordingly, potentially reducing exposure to extreme market conditions. Incorporating circuit breakers into risk management strategies involves setting stop-loss orders and preparing for rapid market changes.

For institutional traders, circuit breakers are often integrated into more complex risk management frameworks. These entities may use algorithms to automatically adjust trading strategies when circuit breakers are activated. Such automated systems can help in quickly rebalancing portfolios to mitigate risks. Additionally, institutions may have contingency plans in place that allow them to take advantage of market pauses to reassess their positions and strategies. This strategic use of circuit breakers can be a valuable tool for maintaining portfolio stability during volatile market conditions.

• Circuit breakers are crucial for managing portfolio risk.
• Individual traders can use them to set stop-loss orders.
• Institutional traders may integrate them into complex risk frameworks.
• Automated systems can adjust strategies when circuit breakers activate.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to SEBI (Securities and Exchange Board of India), NSE Indices (Nifty Indices) and BSE India. Always confirm current rules, rates and contract specifications on the official source before you trade.