Iceberg Order
An iceberg order lets you place a large quantity but show only a small portion of it on the exchange order book at a time. As each visible slice gets executed, the next slice is automatically released. The idea is to avoid spooking the market with a huge bid or offer — the bulk of the order stays hidden under the surface, just like the rest of an iceberg.
Key takeaways:
- Iceberg orders break a big order into smaller visible chunks, called “legs” or “slices”.
- Only one slice is visible to the market at any time; the rest queue up at the broker’s end.
- Available on NSE for equity, F&O and currency segments since the 2020 iceberg framework.
- Helpful for HNIs and institutions, but available to retail traders at most major brokers.
- Not a guarantee of stealth — algorithms can sometimes detect iceberg patterns by execution behaviour.
Why hide an order at all?
Large visible orders can move prices. If you want to buy 50,000 shares of a mid-cap that trades only a few lakh shares a day, putting the full 50,000 on the bid will scare sellers into raising prices. Iceberg orders solve this by exposing only, say, 5,000 shares at a time. The remaining 45,000 wait behind the scenes and get fed in one slice at a time as earlier slices fill.
How iceberg orders work
- You enter the total quantity (e.g., 50,000) and the number of legs (e.g., 10).
- The broker splits the order into ten slices of 5,000 each.
- The first slice goes live on the exchange order book at your specified price.
- When that slice is fully filled, the second slice is released, and so on.
- You can cancel or modify the remaining slices any time — only the slice that is currently live needs to be modified at the exchange.
Rules set by Indian exchanges
- Minimum lot for iceberg is set by NSE/BSE per segment — typically 100 shares or above for cash equity.
- You can split an order into a maximum of ten legs.
- All slices must be at the same price; you cannot stagger price levels within one iceberg.
- The order must be a limit order — market iceberg orders are not allowed.
When iceberg orders make sense
- Mid-cap and small-cap accumulation: Stocks with thin liquidity where a big order would move the price.
- F&O legging: Building a large futures position without revealing intent.
- HNI exits: Selling a sizeable holding gradually to minimise market impact.
Pros and cons
| Pros | Cons |
|---|---|
| Reduces market impact | Slower execution — full quantity may not fill |
| Conceals true size from competitors | Limit-only, so you risk missing the price |
| Useful in illiquid scrips | Sophisticated algos can sometimes detect the pattern |
Iceberg vs other large-order tools
An iceberg differs from a bulk deal (a negotiated single trade reported separately) and from a block deal (a special window with size and price thresholds). Iceberg is purely an order book tactic — it splits one order across the regular order book, while bulk and block deals are exchange-defined mechanisms for transparent large trades.
Frequently asked questions
Is iceberg order available on Lemonn?
Yes, most Indian brokers including Lemonn support iceberg orders for NSE cash, F&O and currency segments.
Does iceberg guarantee my order will fill at the limit price?
No. Each slice still depends on counterparty interest at your price. If the market moves away, the remaining slices stay unfilled.
Can I use iceberg with stop loss?
Iceberg is supported with limit orders. Some brokers allow combining it with a separate stop loss order, but the iceberg itself cannot be a stop loss order.
Are there extra charges for iceberg orders?
Each slice is treated as a separate order, so flat per-order brokerage may apply per slice. STT and exchange fees are charged on actual executed value.
