---
title: "Option chain liquidity: volume, open interest and ticks"
description: "Read volume, open interest and tick size on a dated Nifty chain to judge which strikes trade, and what a closing file cannot show about spreads."
source_url: "https://www.rupeecase.com/learn/path-15/module-15-5-option-chain-liquidity"
---

[Path 15 5 of 13](/learn/path-15/)Liquidity in the chain: spreads, volume and tradable strikes[Next 15.6](/learn/path-15/module-15-6-participant-wise-open-interest)

On Wednesday 10 Jun 2026 the Nifty 23,250 call of the June expiry traded 10,854 contracts. The 23,300 call, one strike up, traded 43,490, which is 4.0 times as many. Same expiry, same lot of 65 units, one strike apart. If you had to buy one of them and sell it an hour later, which row would you trust? The chain does not say. It prints a price in every row, and a price is not the same as a market you can use. I check how much trades at a strike before I trust the number beside it. This lesson reads one chain for tradability: what the end of day file can show, what it cannot, and which checks take a minute. Every figure comes from the files of 10 Jun 2026. Nothing here is live, and nothing is a view on where the index goes.

3By the end you can

1. Say what volume and open interest each count, and put them in the same unit.
2. Spot a strike that prints a price with almost no trade behind it.
3. Explain why a stop order cannot promise a fill and a closing chain cannot time a move.

## The idea, plainly

Liquidity is how easily you can trade a size at a price close to the last one. A liquid strike has many buyers and sellers close together, so an order moves the price by a tick or so. An illiquid strike has a few, far apart, so the same order moves it by more. Three things describe it. The spread is the gap between the highest bid and the lowest offer. Depth is the size waiting at those prices. Volume is how much has traded.

Read one more paragraph, 68 words
Here is the limit of this lesson. NSE's end of day file records the last price, the settlement price, volume and open interest. It holds no quotes, so it has no spread and no depth. Volume and open interest are signs of liquidity, not measures of it. A live screen shows quotes and a closing file cannot. For how orders meet in the book, see [module 10.1](/learn/path-10/module-10-1-how-orders-actually-work-market-microstructure-india).

### Volume or open interest: which matters?

Both, for different jobs. Volume is contracts traded during the day, a flow. Open interest is positions still open at the close, a stock. Think of traffic on a road and cars parked beside it. NSE's file counts open interest in units, so divide by the lot of 65 to get contracts before you set it beside volume. The [chain reading module](/learn/path-15/module-15-1-reading-the-nse-option-chain) covers every column, and the [open interest module](/learn/path-15/module-15-2-open-interest-on-the-option-chain) the change column. Volume divided by open interest, both in contracts, is turnover: how many times the open positions changed hands in the day. The table gives June calls of 10 Jun 2026, with volume and open interest (OI) in contracts and turnover in times.

| Call | Volume | OI | Turnover |
| --- | --- | --- | --- |
| 23,250 | 10,854 | 4,494 | 2.4 |
| 23,300 | 43,490 | 17,272 | 2.5 |
| 23,000 | 17,475 | 25,555 | 0.7 |
| 22,950 | 26 | 104 | 0.25 |

Open interest is a stock: it sits on the round strikes and moves slowly

Call and put open interest at the 10 Jun 2026 close, with the day before marked, for the June expiry. Open interest is in units: divide by the lot of 65 to compare it with volume. Source: NSE end of day data, computed by RupeeCase. As of 10 Jun 2026.
Read one more paragraph, 67 words
The 23,250 and 23,300 calls turned their open positions over by almost the same multiple, 2.4 and 2.5 times, but the 23,300 did it with four times the contracts. The 22,950 call is the other kind: 26 contracts traded against 104 open. Volume answers whether anyone traded this strike today. Open interest answers how many positions are parked there. Neither gives you the price you would get.

### Which strikes trade

Look at the volume chart. The round hundreds are busy and the fifties between them are quiet. The 23,000 call traded 17,475 contracts and the 22,950 call, one strike lower, traded 26. The usual reason is that traders gather at round levels and quotes follow them. The file shows the pattern, not the reason.

Round hundreds trade several times what the fifties beside them do

Contracts traded on 10 Jun 2026 at the strikes around the one nearest the future, calls and puts together, June expiry. The highlighted bar is the strike nearest the future. Source: NSE end of day data, computed by RupeeCase. As of 10 Jun 2026.
The weekly expiry of the same day traded far more at the same strikes

Contracts traded on 10 Jun 2026 for the weekly expiry of 16 Jun, calls and puts together, at the strikes around the one nearest the forward. Compare the scale with the June chart above. Source: NSE end of day data, computed by RupeeCase. As of 10 Jun 2026.
Read one more paragraph, 62 words
Liquidity also depends on the expiry. On the same day the weekly chain that expired on 16 Jun, six days away, traded 6,68,000 contracts at its 23,250 call. The June monthly traded 10,854 at the same strike, so the weekly was 61.5 times as busy. A position in the quieter expiry has fewer counterparties to exit to. Module [F04](/learn/path-12/module-12-4-contract-specs-lots-and-expiries) lists the expiries.

### Cheap options are costly to trade

The smallest price step on Nifty options is Rs 0.05, one tick, so a quoted spread cannot be narrower than that. On a dear option it hardly matters. On a cheap one it is a large share of the price. The table gives the settle in rupees a unit, one tick as a share of it, and volume in contracts, for three June options.

| Option | Settle | Tick share | Volume |
| --- | --- | --- | --- |
| Call 23,250 | 321.65 | 0.016% | 10,854 |
| Call 24,500 | 22.90 | 0.22% | 47,520 |
| Put 20,650 | 0.35 | 14.3% | 12 |

Read one more paragraph, 49 words
The last row is a put settled at Rs 0.35, with 12 contracts traded and 129 open. One tick is 14.3% of its price before any charge. A far strike like that prints a number every day, and the number says little about what an order would meet.

## Worked example: a stop order and a closing chain

Two questions come up on every chain, and the numbers above answer both. Take the 23,000 and 22,950 calls of the June expiry, a strike apart.

Four checks take a minute, and they come before any price is trusted

What a closing chain can answer about one strike, and the question it leaves open. Quotes decide the rest. Source: NSE end of day option files and NSE contract specification; layout by RupeeCase. As of 10 Jun 2026.
Read 3 more paragraphs, 355 words
**How do people set a stop on an option, and when do they exit?** A stop order is an instruction that goes live when its trigger price trades. People tie one to the option's own price, to a level on the index, or to a time. What happens next depends on the strike. The 23,000 call traded 17,475 contracts in the session, so the next trade after a trigger is usually near it. The 22,950 call traded 26 in the whole day, so the next trade can be far from the trigger. A market order takes whatever comes. A limit order may never fill. Either way, a stop is a way out, not a cap on the loss. For a buyer the premium is already the cap. For a seller no trigger limits the loss, because the fill can come after a gap. When to exit is a risk decision made before the trade and sized against the account, and this lesson gives no level. [Module F29](/learn/path-12/module-12-7-position-sizing-and-risk-of-ruin) covers sizing, and the [stop order question page](/learn/questions/stop-loss-on-options) has the short answer.

**What should I look at in option chain analysis for intraday?** The chain here is a closing snapshot. Its open interest and change in open interest compare one close with the next, so a position opened and shut inside the session leaves no mark there. Volume counts that round trip but cannot say when it happened, so the path of the day is missing. A closing chain can show structure: which strikes traded, where open positions sit, how thin the far rows are. It cannot time a turn inside the day. A live screen adds quotes, which is a different tool with its own risks, and this lesson reads only dated files. The [intraday question page](/learn/questions/option-chain-analysis-intraday) has the short answer.

Run the four checks on the 20,650 put. It traded 12 contracts. It has 129 open. One tick is 14.3% of its price. It sits in the June expiry, the quieter of the two that day. All four answers say thin, and the quote, the one thing that would settle it, is not in the file.

## The common mistake

The belief: The chain prints a price for every strike, so I can trade any strike at that price. A price in a row only says that NSE marked the contract. On a thin strike the mark can rest on a handful of trades, or on none, and it need not match the price those few trades went through at. The 20,650 put shows it: a settle of Rs 0.35 on 12 contracts for the whole day. The reverse slip is common too: reading a big open interest as a sign that exits are easy. A strike can hold a large stack of parked positions and trade little. Ask what traded today, in the same unit as what is parked.

## Key takeaways

* The closing file has no bid, offer or depth.
* Volume is traffic today. Open interest is what stays parked, counted in units.
* Divide open interest in units by the lot to compare it with volume.
* Round hundreds trade far more than the fifties beside them.
* One tick is a large share of a cheap option's price.
* A stop order is not a cap, and a closing chain cannot time the day.

The term this section turns on: Stop order

From the module glossary; every term is in the Learn glossary too. Source: Module 15.5, Liquidity in the chain: spreads, volume and tradable strikes.
**Before you trade.** Derivatives trading carries a high risk of loss. SEBI's study "Profitability of Individual Traders in the Equity Derivatives Segment (FY25 to FY26)" (August 2026) found that 87.7% of individual traders in equity F&O made net losses in FY26, with aggregate net losses of Rs 91,685 crore. [Read the SEBI study](https://www.sebi.gov.in/reports-and-statistics/research/aug-2026/study-profitability-of-individual-traders-in-the-equity-derivatives-segment-fy25-fy26-_103835.html)

What does Liquidity in the chain: spreads, volume and tradable strikes cover?Every row has a price. Not every row has a market. Three checks on volume, open interest and tick size. It works through The idea, plainly, Worked example: a stop order and a closing chain, The common mistake, Key takeaways. It is module 15.5 of Path 15, Option Chain and Data, about 9 minutes of reading, free.

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F&O at RupeeCase will do one job: protect a portfolio you already own, by a rule published before it runs. No speculation, no naked option selling, no leveraged bets. It is not available yet.

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  [No hedgeFalls with the marketWith a putA floor, for a premiumIllustration with made up numbers, not a product and not a recommendation.](/hedging)

QQuick check

## 10 questions, 7 to pass.
Each attempt draws 10 of the 15 questions in this module's bank, and a retake draws a fresh set. A pass gives this module's Certificate of Completion. Your result stays on this device and counts towards the Path 15 certificate.

7 of 10 correct passes module 15.5

Every answer is explained when you check; a retake is always free. Source: RupeeCase Learn quiz rules (70% to pass).

  Passed

###

  Certificate ID

Download PNGPrint or save as PDF[Check the ID](/learn/certificates/verify)
Self paced and unproctored. A record of completing free education by RupeeCase; not a NISM certificate and not endorsed by NISM, NSE, BSE or SEBI. It qualifies no one to deal, advise or publish research.

CCheck yourself

## Path 15 so far.
Your quick check results on this device, stop by stop.

Stop 5 of 13 on Path 15

Option Chain and Data: every live stop, this module ringed. Source: RupeeCase Learn, Path 15.

1. [15.1Reading the NSE option chain, column by columnNot yet](/learn/path-15/module-15-1-reading-the-nse-option-chain)
2. [15.2OI and change in OI on the chain: what they can and cannot tell youNot yet](/learn/path-15/module-15-2-open-interest-on-the-option-chain)
3. [15.3Put call ratio: definitions and what the evidence saysNot yet](/learn/path-15/module-15-3-put-call-ratio)
4. [15.4Max pain: the calculation and a Nifty testNot yet](/learn/path-15/module-15-4-max-pain)
5. [15.5Liquidity in the chain: spreads, volume and tradable strikesNot yet](/learn/path-15/module-15-5-option-chain-liquidity#quiz)
6. [15.6Participant wise OI and FII derivatives data, read honestlyNot yet](/learn/path-15/module-15-6-participant-wise-open-interest)
7. [15.7Expected move from the straddle and from IVNot yet](/learn/path-15/module-15-7-expected-move)
8. [15.8Who is on the other side in IndiaNot yet](/learn/path-15/module-15-8-who-is-on-the-other-side)
9. [15.9Gamma exposure: the computation and its assumptionsNot yet](/learn/path-15/module-15-9-gamma-exposure-gex)
10. [15.10Zero gamma, call wall and put wallNot yet](/learn/path-15/module-15-10-zero-gamma-and-walls)
11. [15.11Pinning and max OI strikes: the evidenceNot yet](/learn/path-15/module-15-11-pinning-and-max-oi-strikes)
12. [15.12Vanna and charm flows around expiries and eventsNot yet](/learn/path-15/module-15-12-vanna-and-charm-flows)
13. [15.13An Indian positioning model and its limitsNot yet](/learn/path-15/module-15-13-indian-positioning-model)
14. [TPath test, 30 questionsNot yet](/learn/path-15/module-15-13-indian-positioning-model#pathTestSection)

Path 15 in reading time: 119 minutes over 13 modules

Minutes of reading per module, this one in amber. Source: RupeeCase Learn, Path 15.

    Explore next

## Put the module to work.

* [Free module 13.3Open interest, volume and the four build up patterns7 min read](/learn/path-13/module-13-3-open-interest-and-build-ups)
* [ToolOption payoff builderLegs on a dated Nifty chain, breakevens and charges](/learn/tools/payoff-builder)
* [Free module 15.1Reading the NSE option chain, column by column8 min read](/learn/path-15/module-15-1-reading-the-nse-option-chain)
* [Free module 15.2OI and change in OI on the chain: what they can and cannot tell you8 min read](/learn/path-15/module-15-2-open-interest-on-the-option-chain)
* [Free module 12.7Position sizing and risk of ruin for F&O beginners8 min read](/learn/path-12/module-12-7-position-sizing-and-risk-of-ruin)
* [Free module 15.6Participant wise OI and FII derivatives data, read honestly8 min read](/learn/path-15/module-15-6-participant-wise-open-interest)

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SSources

## Go to the source.
4 sources, NSE the most cited

The publisher of each source listed below. Source: Module 15.5 source list.
1. [NSE, option chain (Nifty 50 index options)](https://www.nseindia.com/option-chain) NSE
2. [NSE, equity derivatives contract specifications (lot size, tick size, strike intervals)](https://www.nseindia.com/static/products-services/equity-derivatives-contract-specifications) NSE
3. [SEBI Investor, Understanding derivatives](https://investor.sebi.gov.in/understanding_derivatives.html) SEBI
4. Harris, L., Trading and Exchanges: Market Microstructure for Practitioners, Oxford University Press, 2003 Book

GTerms

## 5 terms from this module.
LiquidityHow easily a size can be traded at a price close to the last one. A liquid strike has many buyers and sellers close together.
Bid ask spreadThe gap between the highest price a buyer will pay and the lowest price a seller will take. The day file does not carry quotes.
Tick sizeThe smallest step a price can move. A quoted spread is never narrower than one tick.
Turnover at a strikeVolume divided by open interest, both in contracts. It shows how many times the open positions changed hands in the day.
Stop orderAn instruction that goes live when its trigger price trades. It is not a cap on the loss: the fill is the next available price.
[All 230 terms in the glossary](/learn/glossary)

[Question people askHow do people set a stop loss on options, and when do they exit?A short answer with a dated chart](/learn/questions/stop-loss-on-options)[Question people askWhat should I look at in option chain analysis for intraday?A short answer with a dated chart](/learn/questions/option-chain-analysis-intraday)[Related module15.1 Reading the NSE option chain, column by column8 min, Beginner](/learn/path-15/module-15-1-reading-the-nse-option-chain)[Related module15.2 OI and change in OI on the chain: what they can and cannot tell you8 min, Beginner](/learn/path-15/module-15-2-open-interest-on-the-option-chain)[Pillar guideDerivatives and Quant115 modules across paths 12 to 19](/learn/derivatives)

Education only, not investment advice, a research report or a recommendation to buy, sell or hold any security. RupeeCase (QC Alpha Technologies Pvt Ltd) is not registered with SEBI as an investment adviser or research analyst. Contracts and prices shown are for illustration only, come from NSE end of day files at least 30 days old, and are not recommendatory. Derivatives trading carries a high risk of loss.