Green Shoe Option
Also written GSO · Greenshoe option
An option in a public issue to allot up to 15 per cent extra shares, parking the money to buy shares in the market for 30 days after listing if the price falls below the issue price.
In plain language
The first days after listing are nervous ones. If the share slips below the issue price, early sellers can turn a small dip into a rout.
A Green Shoe Option builds a cushion into the issue itself. The company allots some extra shares to subscribers, keeps the money from that extra allotment aside, and uses it to buy shares in the market if the price falls below the issue price. That buying supports the price. The workbook calls it a post-listing price stabilising mechanism.
How it works
Section 3.12.2 sets out the rules:
| Feature | Workbook |
|---|---|
| Extra allotment | Not exceeding 15 per cent of the issue size |
| Allotted to | The general public who subscribed to the issue |
| Proceeds | Kept in a separate bank account |
| Used for | Buying shares in the secondary market if the price falls below the issue price |
| Carried out by | An entity appointed for the purpose — usually the lead manager |
| Duration | 30 days from the day of listing |
The workbook's glossary adds that the option operates "in accordance with the specific provisions in the SEBI (ICDR) Regulations".
The logic is supply and demand. Heavy selling below the issue price meets a ready buyer with money set aside for exactly that purpose. If the price holds above the issue price, there is nothing to stabilise.
A worked example
Illustrative figures. An IPO of 1 crore shares at Rs 200 — an issue size of Rs 200 crore — with a Green Shoe Option.
Maximum extra allotment = 15% × 1 crore = 15 lakh shares
Money parked = 15 lakh × Rs 200 = Rs 30 crore (separate account)
Scenario A. The share lists at Rs 230 and trades between Rs 215 and Rs 260 for a month. It never goes below the Rs 200 issue price, so the stabilising agent has no reason to buy.
Scenario B. The share lists at Rs 205 and slides to Rs 185 in the first week as early subscribers sell. The stabilising agent — the lead manager — buys in the market. At Rs 185, Rs 30 crore could buy up to about 16.2 lakh shares (30 crore ÷ 185). That buying absorbs the selling and helps the price back towards Rs 200.
Day 31. Whatever the price, stabilisation stops. The mechanism covers 30 days from listing, not the life of the share.
Why NISM asks about it
Chapter 3 (Primary Markets), section 3.12.2, and the workbook glossary. It is a numbers question: 15 per cent of issue size and 30 days from listing, with the lead manager usually acting as the stabilising agent. The EBP section also mentions green shoe options in private placements of debt, where they count towards the Rs 50 crore threshold.
Common exam traps
- 15 per cent of the issue size, not 10 or 25.
- 30 days from the day of listing, not from allotment or issue closure.
- The agent buys only when the price falls below the issue price. It does not push the price up in a rising market.
- It stabilises; it does not guarantee. The fund is finite and the period is short.
- The extra shares go to the public subscribers, and the money is ring-fenced in a separate account — it is not general issue proceeds for the company to spend.
Where this is taught
- Series IX · Chapter 4: Issue Management – Important Termsintroduced here
- Series II-A · Chapter 9: Processes related to Public Offering of sharesintroduced here
- Series XIX-A · Chapter 4: Regulatory Framework - Indian Contextintroduced here
- Series XIX-C · Chapter 7: Alternative Investment Funds Ecosystemintroduced here
- Series XIX-E · Chapter 5: Alternative Investment Fund Ecosystemintroduced here
- Series XII · Chapter 3: Primary Marketsintroduced here
Related terms
- Cut-off priceIn a book-built issue, the price at which the issue is fully subscribed. Everyone who bid at or above it succeeds and is allotted at that price.
- Initial Public OfferThe first offer of a company's shares to the public — by fresh issue, by existing shareholders selling through an offer for sale, or both — after which the shares must be listed.
- Merchant bankerA SEBI-registered body corporate engaged in the business of issue management — arranging the selling, buying or subscribing of securities, or acting as manager, consultant or adviser in relation to an issue.
- Electronic Book ProviderThe stock exchange platform on which privately placed debt securities above SEBI's thresholds must be bid for electronically, with published issue details and system-computed cut-offs.