Iceberg Orders on NSE: Disclosed Quantity Rules and Examples

What an Iceberg Order Actually Is on NSE

An iceberg order is a large order that shows only a small slice to the market at a time, like an iceberg whose tip is above water while the bulk stays hidden. The goal is to buy or sell a big quantity without flashing the full size on the order book, because a visible 50,000 share sell order can scare other participants and push the price against you before you finish. In India the word iceberg is used loosely for two mechanisms that work differently, and confusing them is the most common mistake retail traders make.

The first is the exchange level disclosed quantity (DQ) order, which is a native NSE order attribute. You place one order for the full quantity but specify a smaller disclosed quantity, and the exchange shows only that disclosed slice in market depth. When the disclosed slice trades, the exchange automatically reveals the next slice from your hidden balance until the whole order is done or it expires at end of day. The second is the broker iceberg feature, a software layer your broker adds on top, which splits your order into several smaller child orders, called legs, and sends them one after another. Both reduce your visible footprint, but the rules, costs and where they are allowed are not the same.

For most retail traders in equity delivery and intraday, the disclosed quantity order is the genuine, exchange supported way to hide size. For futures and options, where disclosed quantity is generally not available, the broker iceberg feature is what you actually use. Knowing which one you are placing tells you the rules that bind you and the charges you will pay.

NSE Disclosed Quantity Order Rules

The disclosed quantity order is governed by clear NSE rules, and your order is rejected if you break them. The headline rule is the 10 percent floor: the disclosed quantity you enter must be at least 10 percent of the total order quantity. If you place a 10,000 share order, the smallest disclosed quantity the exchange accepts is 1,000 shares. You cannot legally show just 1 or 100 shares of a 10,000 share parent on NSE, which is exactly the misconception the old version of this page implied.

On top of the 10 percent floor, the disclosed quantity for cash market scrips must also be a multiple of the regular lot or at least the minimum tradable quantity for that security, and it obviously cannot exceed the total order quantity. The order has to be a limit order, because the exchange needs a price to sit at while the hidden balance waits in the queue. Market disclosed quantity orders are not allowed. When one disclosed slice is fully traded, the next slice joins the order book and goes to the back of the queue at that price, which is the trade off you accept for hiding size.

Broker Iceberg Feature: How It Differs

When you select iceberg in a broker terminal such as Zerodha Kite, Upstox Pro or Dhan, you are not using the exchange disclosed quantity field. You are telling the broker to chop your single order into multiple equal legs and place them in sequence. Most brokers cap the number of legs (commonly up to 10) and send leg two only after leg one is fully filled, leg three after leg two, and so on. The exchange sees a series of normal small orders, not one parent with a hidden balance.

This distinction has real consequences. Because each leg is a separate order, you pay brokerage and statutory charges per leg, not once for the whole quantity. With a flat per order brokerage like 20 rupees, a 5 leg iceberg costs up to 100 rupees in brokerage versus 20 rupees for a single order. The leg approach is also what makes iceberg usable in futures and options, where the exchange disclosed quantity attribute is not available. A trader who wants to sell 30 lots of Bank Nifty options without showing all 30 lots at once uses the broker iceberg to drip them out leg by leg.

Worked Example: Disclosed Quantity in Reliance Equity

Suppose you manage a portfolio and want to buy 8,000 shares of Reliance Industries on NSE at a limit of 1,450 rupees, a total exposure of about 1.16 crore rupees. Dumping an 8,000 share bid into the book signals strong demand and can lift the offer against you. Instead you place a disclosed quantity limit order. The 10 percent floor means your disclosed quantity must be at least 800 shares, so you set the disclosed quantity to 800. The market sees only 800 shares bid at 1,450; the other 7,200 sit hidden.

As sellers hit your 800 share bid, the exchange refills the visible slice from your hidden 7,200 and the refreshed 800 rejoins the back of the 1,450 queue. This repeats until all 8,000 fill or the session ends. Say it all fills at 1,450. Turnover is 8,000 times 1,450, which is 1.16 crore rupees. On a delivery buy there is no STT on the buy side beyond the standard 0.1 percent that applies on delivery (charged on both legs over the holding period), and at a discount broker the brokerage on delivery is often zero, with exchange transaction charges, SEBI fee, stamp duty and GST being small fractions of turnover. These figures are illustrative. Confirm live charges on your broker contract note.

The tax point matters for the exit. If you sell these Reliance shares for a gain within 12 months, the profit is short term capital gains taxed at 20 percent plus cess. Hold beyond 12 months and it is long term capital gains at 12.5 percent, with the first 1.25 lakh rupees of LTCG in the year exempt. The iceberg only changed how you entered; it did not change how the gain is taxed.

Worked Example: Tick by Tick Iceberg in Bank Nifty Options

Now take a real F&O case where disclosed quantity is not available and the broker iceberg feature is used. You want to sell 10 lots of a Bank Nifty monthly call, say the 52,000 strike, at a premium of 180 rupees. Bank Nifty lot size is 30, so 10 lots is 150 units, and the premium value is 150 times 180, which is 27,000 rupees of premium collected if it all fills at 180. The option order book at that strike is thin, and a single 150 quantity sell can push the bid down. You set a 5 leg iceberg, so each leg is 2 lots, that is 30 quantity.

• Leg 1: broker places sell 30 at 180. The book shows only 30 offered. It fills against resting bids. Premium for this leg: 30 times 180 equals 5,400 rupees.
• Leg 2: only after leg 1 fully fills, broker places sell 30 at 180. Fills. Another 5,400 rupees.
• Leg 3: sell 30 at 180 fires next, fills, 5,400 rupees.
• Leg 4: sell 30 at 180, fills, 5,400 rupees.
• Leg 5: sell 30 at 180, fills, 5,400 rupees. Total filled 150 units, premium collected 27,000 rupees.

Notice the tick by tick behaviour: at no point did the market see more than 30 quantity from you, so the visible pressure stayed light and you avoided walking the bid down. The cost of that discretion is 5 separate orders. At 20 rupees flat brokerage per executed order that is 100 rupees of brokerage versus 20 for a single order. On the sell side of options, STT is 0.1 percent of premium value on the sell leg, so 0.1 percent of 27,000 is 27 rupees. Add exchange transaction charges, SEBI turnover fee, GST at 18 percent on brokerage plus exchange charges, and stamp duty, and your total cost is a modest but real bite. Numbers are illustrative, not a guaranteed outcome.

Crucially, because this is a futures and options trade, the 27,000 rupees premium and any profit or loss when you square off is treated as business income and taxed at your income tax slab rate, not as capital gains. There is no STCG or LTCG concept in F&O. If the option expires worthless and you keep the full premium, that gain is business income; if it moves against you and you buy back at 260, your loss is a business loss you can set off per the income tax rules.

Costs and Charges Stack Up Per Leg

The single biggest practical surprise with broker iceberg orders is the per leg cost stacking. Every leg that executes is a billable order. Brokerage, exchange transaction charges, the SEBI turnover fee, GST and stamp duty are all computed and accumulated leg by leg. The statutory percentages do not change, but flat per order brokerage multiplies directly with the number of legs.

• Brokerage: flat per order brokers charge per executed leg, so 5 legs can mean 5 times the brokerage of one order.
• STT in options: 0.1 percent of premium on the sell side, charged on whatever fills, so it tracks filled value not leg count.
• Exchange transaction charges and SEBI fee: small percentages of turnover, charged on each leg, summing to the same total as one order of equal size.
• GST: 18 percent on brokerage plus exchange transaction charges, so it rises with the higher brokerage from multiple legs.
• Stamp duty: on the buy side, a small percentage of turnover, applied per leg.

The takeaway is that a disclosed quantity order on NSE keeps you to one order and one set of per order charges, while a broker iceberg multiplies the flat per order portion. If you are in equity and can use disclosed quantity, it is usually cheaper than the broker iceberg for the same hiding effect.

When Iceberg Helps and When It Hurts

Iceberg and disclosed quantity earn their keep when your order is large relative to the visible liquidity in the book and you care more about price impact than speed. A patient buyer accumulating a midcap, or a desk unwinding a sizeable options position in a thin strike, benefits from showing a small slice and letting the market come to it. The slower, quieter fill protects you from front running and from your own order moving the price.

Iceberg hurts when you need certainty and speed. Because each refreshed slice or each new leg goes to the back of the queue, a fast moving market can run away from your limit before the hidden balance fills, leaving you partially done. For scalpers and momentum traders chasing a breakout, iceberg is the wrong tool; a single limit or even a marketable order gets you in fully. Iceberg also does not make you invisible to the participants who actually trade against you, and large hidden flow can sometimes be inferred from repeated refreshes at the same price.

• Good fit: large order versus thin book, low urgency, accumulation or distribution over the session.
• Good fit: F&O positions in less liquid strikes where one big order would walk the price.
• Poor fit: fast breakouts and scalps where partial fills cost more than market impact.
• Poor fit: tiny orders where the visible size is already negligible and legs only add brokerage.

Common Mistakes Indian Traders Make

The first mistake is breaking the 10 percent disclosed quantity floor and being surprised by a rejection. If you try to show 100 shares of a 5,000 share order, NSE rejects it because 100 is under the 1,000 minimum. The second is assuming the broker iceberg feature is a free lunch; traders forget they are paying brokerage per leg and watch a 10 leg iceberg quietly rack up 200 rupees of brokerage on a small trade where the saved slippage was less than that.

The third mistake is using iceberg in a fast market and then complaining about partial fills. Because hidden balance and later legs queue behind everyone else at your price, a sharp move leaves you incomplete. The fourth is treating F&O iceberg gains as capital gains at tax time; they are business income and must be reported as such, with brokerage and charges deductible as business expenses. Keep your contract notes so your accountant can reconcile per leg charges.

Iceberg Versus Other NSE Order Types

It helps to place iceberg next to the order types you already know. A market order takes whatever price the book offers and shows full intent through the print, with no hiding. A limit order shows your full quantity at your price unless you add disclosed quantity. A disclosed quantity order is a limit order with the visible part capped at the 10 percent or higher slice you choose. The broker iceberg is a sequence of limit orders managed by software.

Practical Checklist Before You Place One

• Decide which one you need: disclosed quantity for equity, broker iceberg legs for F&O.
• For disclosed quantity, confirm your visible slice is at least 10 percent of total and a clean lot multiple.
• Use a limit price you are genuinely willing to wait at, since hidden balance and legs queue behind the market.
• Estimate per leg brokerage and charges so the saved slippage actually exceeds the extra cost.
• Watch the fills; in a fast market be ready to cancel the balance or convert to a single order.
• Log every leg in your trading journal so your F&O business income and charges reconcile at tax time.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to NSE India, SEBI (Securities and Exchange Board of India) and Zerodha Varsity. Always confirm current rules, rates and contract specifications on the official source before you trade.