Guide
What are circuit limits on the NSE and BSE?
Circuit limits are price bands set by the exchanges that restrict how far a stock or index can move in a single session. When the price hits the band, trading is either capped at that level or halted for a period — an upper circuit on a sharp rise, a lower circuit on a sharp fall. Their purpose is to curb extreme volatility and give the market time to absorb information in an orderly way.
Why circuit limits exist
Markets can overreact to news, rumours or sudden order imbalances. Circuit limits act as a built-in cooling mechanism: by capping or pausing trading at a defined band, they slow down panic-driven or euphoric moves and give participants a chance to reassess before trading continues.
They are a stability and investor-protection measure, not a prediction about value. A stock hitting a circuit does not mean the move is right or wrong — only that it has moved far enough, fast enough, to trigger the exchange's pre-set band.
Upper and lower circuits on individual stocks
An upper circuit is the highest price a stock may trade at on a given day; a lower circuit is the lowest. These bands are set as a percentage of the previous close — commonly tiers such as 5%, 10% or 20%, depending on the stock — and are reviewed by the exchange.
When a stock is locked at its upper circuit, there are buyers but effectively no sellers willing to trade at the cap, so orders queue and trading can stall. At the lower circuit the reverse happens: sellers pile up with few buyers. Stocks in the derivatives segment are treated differently and do not carry the same fixed daily price bands as many cash-only stocks.
Index-level circuit breakers
Beyond individual stocks, the exchanges apply market-wide circuit breakers to benchmark indices. If a major index such as Nifty or Sensex moves by a large set percentage from the previous close, trading across the whole market is halted for a defined duration, with the length of the halt depending on the size of the move and the time of day.
These index-level halts are reserved for severe, broad moves. They are designed to interrupt a market-wide cascade — a sharp, self-reinforcing sell-off or surge — and let participants regroup before normal trading resumes.
A worked Indian example
Suppose a stock closed yesterday at ₹200 and carries a 10% circuit band. Its upper circuit for today is ₹220 and its lower circuit is ₹180. If strong buying pushes it to ₹220, it locks at the upper circuit; buy orders keep arriving but no one will sell at the cap, so the price cannot rise further that day. If heavy selling drove it to ₹180 instead, it would lock at the lower circuit, with sellers unable to find buyers at the floor.
What circuit limits mean for traders
A locked circuit is a liquidity problem as much as a price one. If a stock you hold hits the lower circuit, you may be unable to sell at all that day, because there are no buyers at the floor — an important risk in low-liquidity and small-company stocks that can move circuit-to-circuit. Conversely, chasing a stock locked at its upper circuit can leave you holding an order that never fills. Understanding the bands of the stocks you trade is part of basic risk awareness.
Common Questions
Frequently Asked Questions
What does it mean when a stock hits the upper circuit?
+It means the stock has risen to the highest price the exchange allows it to trade at that day. At that point there are buyers but effectively no sellers willing to trade at the cap, so the price cannot rise further and buy orders queue up. The stock is described as locked at the upper circuit.
Can I sell a stock that is at its lower circuit?
+Often you cannot, because at the lower circuit there are sellers but few or no buyers willing to trade at the floor, so sell orders queue without matching. This is a real liquidity risk, especially in thinly traded small-company stocks that can lock circuit after circuit. It is one reason liquidity matters when choosing what to trade.
Do all stocks have the same circuit limit?
+No. Circuit bands are set per stock as a percentage of the previous close, with common tiers such as 5%, 10% or 20% depending on the stock, and they are reviewed by the exchange. Stocks in the derivatives segment are treated differently and do not carry the same fixed daily price bands as many cash-only stocks. Always check the applicable band for the stock you trade.
What is a market-wide circuit breaker?
+A market-wide circuit breaker halts trading across the whole market when a benchmark index moves by a large set percentage from the previous close. The duration of the halt depends on the size of the move and the time of day. It is reserved for severe, broad moves and is meant to interrupt a market-wide cascade so participants can regroup.
Are circuit limits a sign that a stock is a good or bad buy?
+No. A circuit only tells you a price has moved far and fast enough to hit the exchange's pre-set band; it says nothing about whether the move is justified. Stocks can hit circuits for many reasons, including thin liquidity. Treat a circuit as information about volatility and liquidity, not as a buy or sell signal.