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What is the green shoe option and price stabilisation in an IPO
The green shoe option is a SEBI-permitted price stabilisation mechanism where the lead manager borrows up to 15% of the IPO size from promoters, over-allots shares, and uses the IPO proceeds to buy shares in the market for up to 30 days after listing to prevent a sharp fall below the issue price.
In one line
The green shoe option (formally, the price stabilisation mechanism under SEBI ICDR Regulations) lets the stabilising agent borrow up to 15% of the IPO issue size from promoters, over-allot that many extra shares in the IPO, and then use the collected proceeds to buy shares in the secondary market for up to 30 days post-listing to support the price near the issue price, with any unsold proceeds returned to promoters by way of the over-allotted shares.
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Why a new issue needs price stabilisation
An IPO is priced in advance of listing. Even the most sophisticated book-building process cannot perfectly predict where the market will clear a week or a month later, and a newly listed stock, with no established secondary-market liquidity, can be volatile. If the stock falls significantly below its issue price in the first weeks, retail allottees who paid the full issue price face immediate losses, confidence in the issuer is damaged, and the company's brand in the capital market is tarnished. The green shoe option is the mechanism designed to create a temporary buyer to absorb selling pressure and keep the price from collapsing.
The name comes from the Green Shoe Manufacturing Company, which was the first to use this stabilisation mechanism in the United States. In India, SEBI governs its use under the ICDR Regulations and it is optional. Not every IPO uses it, and the presence or absence of the mechanism is disclosed in the prospectus. When used, the stabilising agent is usually the lead manager (a SEBI-registered merchant banker) who is explicitly authorised to run the stabilisation account.
How the mechanics work
The stabilising agent borrows shares from the promoters of the company (or pre-IPO shareholders who agree to lend them) before the IPO. It then over-allots these borrowed shares to IPO applicants, so if the IPO size is 100 units, up to 115 units can be allotted in total, with the extra 15 being borrowed shares. The proceeds from selling those 15 extra shares go into a special stabilisation account, not to the company.
After listing, the stabilising agent has up to 30 days to use that stabilisation account. If the share price trades below the issue price, the agent buys shares in the market using the account money, supporting the price and simultaneously returning shares to the promoters from whom they were borrowed. If the price holds above the issue price and there is no need to buy in the market, the stabilising agent returns the proceeds in the account by subscribing to fresh shares from the company at the issue price, which then go to the promoters, completing the return of the borrowed shares. The company keeps the proceeds from that final subscription as part of the IPO funding.
What it means for an investor
For a retail allottee, the green shoe is a backstop against a sharp post-listing crash. The stabilisation buying creates a floor that may absorb early selling, giving a new investor a somewhat more graceful exit window if they decide the listing price is their preferred exit. It is not a guarantee: the stabilisation account is finite, and if selling pressure exceeds the 15% over-allotment proceeds, the price can fall past the issue price anyway.
Knowing whether an IPO has a green shoe option and how much runway is in the stabilisation account is useful context for the weeks after listing. The stabilising agent is required to disclose its activities in the stabilisation account, so the data is public. Once the 30-day window closes or the account is exhausted, the price is entirely on its own, which is when the real market verdict on the IPO's pricing becomes visible.
FAQ4 reader questions · AEO-eligible
Common questions on green shoe option.
What is the green shoe option in an IPO?
The green shoe option is a SEBI-permitted price stabilisation mechanism where the lead manager borrows up to 15% of the IPO size from promoters, over-allots those shares, and uses the proceeds to buy shares in the secondary market for up to 30 days after listing to support the price near the issue price.
Does every IPO have a green shoe option?
No. The green shoe (price stabilisation mechanism) is optional and must be disclosed in the prospectus if used. Many IPOs do not use it, particularly smaller issues or those priced conservatively where listing volatility is not expected to be a major concern.
What happens to the green shoe proceeds if the price does not fall?
If the share price holds above the issue price, the stabilising agent does not need to buy in the market. The proceeds in the stabilisation account are used to subscribe to fresh shares from the company at the issue price, which are then delivered to the promoters to repay the borrowed shares. The company retains those proceeds as part of the IPO funding.
How long does the green shoe stabilisation last?
The stabilisation period under SEBI ICDR Regulations is up to 30 days from the date of allotment in the IPO. After this window closes, or when the stabilisation account is exhausted, the price stabilisation ends and the stock trades entirely on market forces.
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