Upper Circuit and Lower Circuit Explained: Why You May Not Be Able to Buy or Sell
A stock hitting upper circuit means it has reached the highest price allowed under its applicable price band for that trading day.
A lower circuit means the stock has reached the lowest permitted price.
The important part is this: hitting a circuit does not automatically stop all trading. Trading can continue at the circuit price if both buyers and sellers are available.
What is an upper circuit?
Suppose a stock closed yesterday at ₹100 and has a 10% price band.
Its maximum price for the next session would normally be around ₹110.
If the stock reaches ₹110 and cannot move higher, it has hit its upper circuit.
The real problem for someone trying to buy appears when there are thousands of buyers at ₹110 but almost nobody wants to sell.
Your buy order may remain pending because there is no seller available to complete the trade.
This is why a stock can appear “locked in upper circuit.”
What is a lower circuit?
Using the same ₹100 stock with a 10% band, its lower limit would be around ₹90.
If bad news or heavy selling pushes it to ₹90, the price cannot move below the applicable band during that session.
If thousands of investors want to sell at ₹90 but there are very few buyers, sell orders begin to pile up.
You may place a sell order successfully but still fail to exit because someone must be willing to buy your shares.
This liquidity risk is especially important in small-cap, micro-cap and highly speculative stocks.
Does every Indian stock have the same circuit limit?
No.
According to the NSE price-band framework, different securities can have daily price bands such as 2%, 5%, 10% or 20%.
Stocks on which derivative products are available generally do not have the same fixed daily price bands. Instead, exchanges use dynamic operating ranges that can be relaxed under predefined conditions.
So a 5% circuit in one stock does not mean every NSE-listed company has a 5% limit.
Why do stocks hit repeated upper circuits?
Repeated upper circuits usually happen when demand is much higher than available supply.
Common reasons include:
- Major company announcements
- Strong financial results
- Large orders or contracts
- Corporate actions
- Very low public liquidity
- Speculative buying
- Sudden market attention
But repeated upper circuits are not proof that a company is fundamentally strong.
In illiquid stocks, even relatively small buying pressure can create a large imbalance between buyers and sellers.
Why are repeated lower circuits dangerous?
Lower circuits become dangerous when an investor assumes that a stop-loss guarantees an exit.
It does not.
Imagine you hold a stock at ₹100 with a stop-loss at ₹94.
Unexpected bad news appears before the next market session and the stock opens directly at its lower circuit of ₹90.
If there are no buyers, your ₹94 stop-loss cannot magically execute at ₹94.
You may remain stuck with the shares until buyers appear.
This is called liquidity risk, and it is one reason extremely illiquid stocks can be far riskier than their charts suggest.
Do foreign stock markets also have upper and lower circuits?
Different countries handle extreme stock-price movements differently.
Some markets impose fixed daily limits on individual stocks. Others allow prices to move more freely but temporarily pause trading when volatility becomes extreme.
| Market | Fixed daily stock price limit? | Main system |
|---|---|---|
| India | Yes, for many stocks | 2%, 5%, 10% or 20% bands; dynamic ranges for some securities |
| China | Yes | Main-board stocks generally have daily limits; STAR Market uses wider limits |
| Japan | Yes | Daily price limits based on the stock's reference price |
| South Korea | Yes | Generally up to ±30% from the base price |
| Taiwan | Yes | Generally ±10% for listed stocks |
| United States | No fixed daily cap | Limit Up-Limit Down trading pauses |
| Hong Kong | No fixed daily cap | Volatility Control Mechanism |
China's system is relatively close to the idea familiar to Indian investors. The Shanghai Stock Exchange applies daily price limits, while STAR Market stocks generally have a 20% daily limit after their first five trading days.
South Korea allows a wider ±30% daily price range, while Taiwan generally applies a ±10% daily fluctuation limit.
Japan also uses daily price limits, although the allowed movement is determined using absolute price ranges based on the stock's reference price rather than one universal percentage.
The United States works differently. Stocks do not simply stop permanently at a fixed +10% or -10% daily circuit. Instead, the Limit Up-Limit Down system creates temporary price bands around a reference price. Extreme moves can trigger a temporary trading pause.
Hong Kong also does not use a normal fixed daily upper-lower circuit system. Its Volatility Control Mechanism can create a short cooling-off period when selected securities move unusually fast.
Stock circuit vs market circuit breaker
These are different concepts.
An individual-stock circuit controls the permitted movement of one security.
A market-wide circuit breaker can halt trading across a large part of the entire market after an extreme index move.
India uses both types of protection.
So when a small-cap stock hits a 5% lower circuit, that is very different from a market-wide halt caused by a major fall in the benchmark index.
What should investors remember?
The most important point is simple:
A circuit does not guarantee liquidity.
An upper circuit can prevent you from getting into a stock because sellers are unavailable.
A lower circuit can prevent you from getting out because buyers are unavailable.
Before entering a small or illiquid stock, investors should therefore check trading volume, delivery activity, bid-ask depth and the stock's applicable price band instead of looking only at potential returns.
Disclaimer: This article is for educational purposes only and does not constitute investment advice. Exchange rules can vary by security, market segment and listing conditions.
