Upper Circuit and Lower Circuit: Meaning Explained

What Is the Upper Circuit and Lower Circuit Meaning?

The upper circuit and lower circuit are the maximum and minimum prices at which a stock can trade on a given day. The exchange sets these limits as a percentage of the previous day’s closing price. When a stock hits the upper circuit, it cannot rise any further that day; when it hits the lower circuit, it cannot fall any further. This is what people mean when they ask about the circuit limit in the share market.

These limits are also called price bands. They apply to individual stocks, and they are different from the market-wide circuit breakers that halt all trading when the index moves sharply. Both exist to keep markets orderly, but they work at different levels.

How Price Bands on Individual Stocks Work

In India, stock exchanges assign a price band to most listed stocks. The band is usually 2%, 5%, 10%, or 20% of the previous day’s closing price. For example, if a stock closes at ₹100 and has a 10% band, the upper circuit is ₹110 and the lower circuit is ₹90. The stock can trade anywhere between these two prices during the day.

Not every stock has the same band. The exchange decides the band based on factors such as liquidity, volatility, and whether the stock is in the derivatives segment. Stocks in the futures and options (F&O) segment have no fixed band. They get a dynamic price band, which starts at 10% and which the exchange can widen in steps during the day if the price keeps pressing against it. The exact band for each stock is published by the exchange and can change over time.

When a stock reaches its upper or lower circuit, trading in that stock does not stop completely. Orders can still be placed within the band, but nothing can trade beyond the circuit price. Buyers can queue up at the upper circuit, but no trades can happen above that price. Similarly, sellers can queue up at the lower circuit, but no trades can happen below it.

Why Do Circuit Limits Exist?

Circuit limits are a circuit breaker for individual stocks. They are designed to:

• Prevent extreme price swings caused by panic selling or speculative buying.
• Give investors time to react to news or events without being forced to trade at irrational prices.
• Reduce the risk of manipulation by limiting how far a stock can be pushed in a single session.
• Allow the market to digest information and avoid overreaction.

Without these limits, a stock could theoretically fall to zero or rise astronomically in a single day due to a rumor or a large order. The limits act as a speed bump.

Index-Wide Circuit Breakers in India

Separately from stock-level bands, the Indian stock market has market-wide circuit breakers. These are triggered when the benchmark indices—the Nifty 50 or the Sensex—move by a certain percentage from the previous day’s close. The thresholds are 10%, 15%, and 20%. To see how the market is moving today, check our markets page and the latest FII and DII data.

When a circuit breaker is triggered, trading in all equity and equity derivatives is halted across the exchanges (NSE, BSE and MSE). The trigger is a move in either the Nifty 50 or the Sensex, whichever is breached first. How long the halt lasts depends on the level and the time of day:

Index move	Before 1:00 PM	1:00 PM to 2:30 PM	After 2:30 PM
10%	45-minute halt	15-minute halt	No halt
15%	1 hour 45 minutes	45 minutes (before 2:00 PM); rest of the day from 2:00 PM	Rest of the day
20%	Rest of the day	Rest of the day	Rest of the day

When trading resumes after a 10% or 15% halt, it restarts with a 15-minute pre-open call auction session. The framework is set by the Securities and Exchange Board of India (SEBI) and published by the exchanges.

These index-wide circuit breakers are rare but can happen during major global events or market crashes. They are meant to give the entire market a pause to absorb information and prevent a cascade of panic selling.

What Happens to Orders When a Stock Hits a Circuit?

When a stock hits the upper circuit, it means there are more buyers than sellers at the maximum allowed price. Buyers can place orders at the upper circuit price, but they will only be executed if there are sellers willing to sell at that price. In practice, if the stock is locked at the upper circuit, there are usually no sellers, so buy orders remain pending.

Similarly, when a stock hits the lower circuit, there are more sellers than buyers at the minimum allowed price. Sell orders queue up, but they will only execute if there are buyers willing to buy at that price. If the stock is locked at the lower circuit, there are usually no buyers, so sell orders remain pending.

This queuing can last for the entire trading session. If you place a market order when a stock is at a circuit, it may not execute at all, or it may execute at the circuit price if there is a matching order. Limit orders at the circuit price will also queue. It is important to understand that hitting a circuit does not guarantee your order will be filled.

Common Mistakes and Risks

Circuit limits can create traps for inexperienced investors. Here are some common mistakes:

• Chasing a stock at the upper circuit: Buying a stock simply because it is locked at the upper circuit can be risky. The price may be driven by speculation, and when the circuit opens, the stock could fall sharply.
• Panic selling at the lower circuit: Selling in a panic when a stock hits the lower circuit may lock in losses. Sometimes the fall is temporary, and the stock may recover.
• Assuming you can always trade: When a stock is at a circuit, liquidity dries up. You may not be able to buy or sell at the price you want.
• Ignoring the band percentage: A 20% band means the stock can move much more than a 5% band. Know the band for the stock you are trading.
• Confusing stock circuits with index circuit breakers: They are different. A stock hitting its circuit does not halt the whole market.

Also, note that circuit limits can change. The exchange may revise the band for a stock based on its trading behavior. Always check the current band before placing orders. If you are new to the market, see our guides to reading candlestick charts and large, mid and small cap stocks.

Circuit Limits vs. Index Circuit Breakers: Key Differences

Feature	Stock Circuit Limit	Index Circuit Breaker
Scope	Individual stock	Entire market
Trigger	Price reaches band limit	Index moves by 10%, 15%, or 20%
Effect	Trading continues at circuit price	Trading halts for a period
Frequency	Common	Rare

Frequently Asked Questions

What is the meaning of upper circuit and lower circuit in share market?

The upper circuit is the maximum price a stock can reach in a day, and the lower circuit is the minimum. They are set as a percentage of the previous day’s closing price to limit volatility.

Can I buy a stock at the upper circuit?

You can place a buy order at the upper circuit price, but it will only execute if there are sellers willing to sell at that price. If the stock is locked at the upper circuit, there are usually no sellers, so your order may remain pending.

What happens if a stock hits the lower circuit?

If a stock hits the lower circuit, it cannot fall further that day. Sellers can place orders at the lower circuit price, but they will only execute if there are buyers. Often, there are no buyers, so sell orders queue up.

Are circuit limits the same for all stocks?

No. The exchange assigns different price bands—such as 2%, 5%, 10%, or 20%—based on factors like liquidity and volatility. Stocks in the F&O segment have no fixed band; they use a dynamic band that starts at 10%.