🎯 In 30 seconds: Volume is the number of shares that changed hands. Every share bought was sold by someone, so volume does not tell you who "won". It tells you how many people cared. A price move on heavy volume has more participants behind it than the same move on light volume. India adds a statistic most markets do not publish for each share: the delivery percentage, the part of the day's trading that ended with shares actually moving into a buyer's demat account rather than being bought and sold again within the day. Add relative volume, VWAP and the exchanges' bulk and block deal lists, and you can usually tell whether a move was a crowd of day traders or real money changing hands. None of it predicts the next move on its own.
What volume measures
Picture a Sunday vegetable market. If tomatoes go from ₹40 a kilo to ₹60 and only two shoppers bought any, you would not read much into it. If the price jumps and every stall sells out by 9 a.m., something real has changed: a bad harvest, a festival, a truck strike. Share markets are the same. The price tells you where trades happened. Volume tells you how much trading it took to get there.
On an Indian quote or chart you will see three related numbers:
- Volume (traded quantity): the number of shares traded in the period, on that exchange.
- Value (turnover): the rupee amount traded, usually shown in lakh or crore. It is roughly volume multiplied by the average price.
- Number of trades: how many separate trades made up the volume. A day with 10 lakh shares in 200 trades is very different from 10 lakh shares in 40,000 trades.
NSE and BSE each report their own volume, so a share's total market volume is the sum of the two. Most charts show only one exchange, so check which one.
Why volume matters
Volume does three jobs for a trader.
- Conviction. A move that many people took part in is harder to reverse than one a few orders created.
- Liquidity. If a share trades ₹50 crore a day, your ₹50,000 order will not move it. If it trades ₹5 lakh a day, your order might be a tenth of the whole day. See Bid, ask, market depth and liquidity.
- Warning. A sudden volume spike with no news is worth investigating. It can be a large investor building a stake, a fund leaving, or an operator preparing a pump. See Scams and red flags.
Volume on breakouts and selloffs
The classic use of volume is to judge a breakout: a move above a price level the share has failed to cross before.
When a share breaks out on two or three times its normal volume, many buyers were willing to pay up at once. When it breaks out on below-average volume, a few orders pushed it through a level that most traders did not bother to defend, and it more often slips back.
The same logic works on the way down. A fall on heavy volume after bad results means many holders decided to sell at once. A slow drift lower on shrinking volume often means sellers are running out, though not always.
- Rising price, rising volume: more participants joining the move.
- Rising price, falling volume: the move is continuing with fewer participants. Watch closely.
- Falling price, heavy volume: broad selling, often after news.
- Huge volume, little price change: a big buyer and a big seller meeting. One of them is usually a fund or a promoter entity. The deal lists below can tell you who.
The Technical Analysis Guide treats this in its chapters on volume and breakouts and gaps.
Relative volume and news spikes
Relative volume compares today's volume with a normal day. Divide today's volume by the average daily volume over a recent stretch, often 20 or 50 trading days.
| Rao Electricals, 20-day average volume | 3.2 lakh shares |
| Volume on the breakout day | 9.2 lakh shares |
| Relative volume: 9.2 / 3.2 | 2.9 |
As a rough guide, a reading near 1 is a normal day, 2 is busy, and 3 or more usually means news: results, a large order win, an index inclusion, a block deal or a rumour. In India, check the exchange's corporate announcements page first. Companies must disclose material events to the exchanges, and a spike often lines up with a filing. Where to get reliable market information shows how to find it.
VWAP: the average price everyone paid today
The volume-weighted average price (VWAP) is the total rupee value of all trades divided by the total shares traded. It weights each price by how many shares traded there. Quote pages often label it "average price". Here is a day for Sharma Foods split into four chunks:
| Time (IST) | Shares traded | Average price in that window | Value |
|---|---|---|---|
| 9:15 to 10:00 | 1,50,000 | ₹480 | ₹7,20,00,000 |
| 10:00 to 11:30 | 80,000 | ₹484 | ₹3,87,20,000 |
| 11:30 to 1:30 | 60,000 | ₹487 | ₹2,92,20,000 |
| 1:30 to 3:30 | 1,10,000 | ₹489 | ₹5,37,90,000 |
| Total | 4,00,000 | ₹19,37,30,000 |
| VWAP: ₹19,37,30,000 / 4,00,000 | ₹484.33 |
| Simple average of the four prices: (480 + 484 + 487 + 489) / 4 | ₹485.00 |
VWAP is lower than the simple average because the busiest window, the first 45 minutes, was also the cheapest. That is the point of weighting: it tells you where most of the money actually changed hands.
How people use it:
- Fund dealers are often judged on whether they bought below or sold above the day's VWAP.
- Intraday traders watch whether the price is holding above VWAP (buyers in control on average) or below it.
- Closing prices in India have long been built from a VWAP. For most shares the official close is the VWAP of the last 30 minutes of trading. For shares with futures and options, a closing auction has set the close since 3 August 2026 (as of October 2026).
VWAP resets every morning. It describes today only, and like every indicator it describes the past. The guide's chapter on volume indicators covers anchored and multi-day versions.
Delivery percentage: India's extra number
When you buy shares for delivery and hold them overnight, the shares move from the seller's demat account to yours through the clearing corporation. When an intraday trader buys in the morning and sells by the afternoon, nothing is delivered: the trades net out. Exchanges publish, for each share and each day, how much of the traded quantity was actually delivered. NSE's daily file has the columns deliverable quantity and delivery percentage next to open, high, low, close and average price.
| Traded quantity | 10,00,000 |
| Deliverable quantity | 6,20,000 |
| Delivery %: 6,20,000 / 10,00,000 | 62% |
For context, SEBI's annual report for 2025-26 says that across the two main clearing corporations, delivered quantity was 29.3% of traded quantity in 2025-26, up from 23.6% in 2024-25. A share delivering 60% or more on a busy day is seeing far more ownership change than the market as a whole.
How traders read it:
- Rising price with high delivery suggests buyers are keeping the shares, not flipping them.
- Rising price with low delivery suggests the move was mostly intraday churn and may fade.
- Falling price with high delivery means holders sold and someone else took the shares home. That can be a fund exiting or long-term buyers stepping in. Delivery alone cannot tell you which.
Bulk deals and block deals: who traded big
Indian exchanges publish the names behind the largest trades. This is one of the most useful free data sets in the market.
| Bulk deal | Block deal | |
|---|---|---|
| What it is | All trades by one client in one share on one day that together exceed 0.5% of the company's listed equity shares | A single large trade done in a separate trading window |
| Where it trades | The normal market, in one or many trades | Special windows: 8:45 to 9:00 a.m. and 2:05 to 2:20 p.m. |
| Size rule | Above 0.5% of listed equity shares | Minimum order of ₹25 crore |
| Price rule | Normal price band | Within ±3% of a reference price (previous close for the morning window, a VWAP from just before the afternoon window) |
| Disclosure | Broker reports it; exchange publishes client name, quantity and price the same day after market hours | Exchange publishes the details |
The block deal rules shown are SEBI's revised framework, which took effect on 7 December 2025. Before that, the minimum was ₹10 crore and the price range ±1% (as of October 2026).
How to use the lists: when a share moves on heavy volume, check NSE's "large deals" page or BSE's bulk deal page. If a well-known fund bought 1.2% of the company in a bulk deal, the volume has a name attached. If a promoter entity sold through a block deal, you know the supply came from inside. Neither is a buy or sell signal on its own; large investors are wrong often enough. The chapter Promoters, insiders and institutions goes further into shareholding data.
On-balance volume (OBV)
On-balance volume is a running total. On a day the share closes higher, add that day's volume. On a day it closes lower, subtract it. On an unchanged day, do nothing.
| Day | Close | Volume (lakh) | Rule | OBV (lakh) |
|---|---|---|---|---|
| 1 | ₹500 | 3.0 | start | 0 |
| 2 | ₹506 | 4.0 | up: add | 4.0 |
| 3 | ₹503 | 2.0 | down: subtract | 2.0 |
| 4 | ₹510 | 5.0 | up: add | 7.0 |
| 5 | ₹508 | 1.5 | down: subtract | 5.5 |
The number itself means nothing. Its direction is what traders watch: OBV rising while price goes sideways is read as quiet buying; OBV falling while price holds up is read as quiet selling. It is a crude tool. A whole day's volume is credited to one side because of a small change in the close. Some Indian traders build a similar running total using only delivered quantity, on the theory that it filters out intraday noise. That is a reasonable idea to test, not an established result.
What research says
Volume has been studied more than most chart tools. One well-known paper, Gervais, Kaniel and Mingelgrin (2001) in the Journal of Finance, found that shares with unusually high trading volume over a day or a week tended to rise over the following month, and shares with unusually low volume tended to fall. The authors linked it to visibility: a volume spike draws attention, and attention brings buyers.
That study used US shares. It is an average across many shares over a past period, measured over a month, not a trading rule. It does not mean any single high-volume day leads to gains, and it does not test India's delivery data. It does support the broad idea that volume carries information that price alone does not. Claims you will hear on social media that "high delivery always means a rally" are popular but unproven; test them on your own records before trusting them.
Try it
Pick three shares: one Nifty 50 company, one mid cap and one small cap. For ten trading days, note each day's close, volume, traded value and delivery percentage from the NSE website (the share's quote page, or the security-wise historical data report). Work out the 10-day average volume and each day's relative volume, and mark any day above 2. For each of those days, look at the company's announcements and NSE's large deals page and write down what you find. At the end, compare the three shares' average delivery percentage with the market-wide 29.3% SEBI reported for 2025-26, and write one sentence on what kind of trading dominates each share.
- A share's 20-day average volume is 4 lakh and today it traded 10 lakh. What is the relative volume? Answer: 2.5 (10 / 4). A busy day; look for news or a deal.
- A share traded 8 lakh shares and 2 lakh were delivered. What is the delivery percentage, and how does it compare with the 2025-26 market figure? Answer: 25%, a little below the 29.3% SEBI reported across the market for 2025-26.
- Why is a 100% delivery figure in a BE-series share not a strong signal? Answer: BE is trade-for-trade, so every trade must be settled by delivery. The figure is high by rule.
- What is the difference between a bulk deal and a block deal? Answer: A bulk deal is one client's trades in a day totalling more than 0.5% of listed equity shares, done in the normal market. A block deal is a single trade of at least ₹25 crore done in a special window.
- Four windows trade 1,50,000 shares at ₹480, 80,000 at ₹484, 60,000 at ₹487 and 1,10,000 at ₹489. What is the VWAP? Answer: ₹19,37,30,000 / 4,00,000 = ₹484.33.
Sources
- SEBI Annual Report 2025-26, Chapter 4: Secondary markets (delivery statistics, block deal review, closing auction)
- SEBI: Master circular for stock exchanges and clearing corporations, Chapter 1 Trading (bulk deal definition and disclosure)
- SCC Online (9 October 2025): SEBI notifies revised block deal framework
- NSE: Market timings (block deal sessions)
- NSE: Large deals (bulk and block deals)
- NSE: Security-wise historical data (price, volume and deliverable quantity)
- IDEAS/RePEc: Gervais, Kaniel and Mingelgrin (2001), The High-Volume Return Premium, Journal of Finance