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What is Book Building Process in IPO? Types of Book Building

By HDFC SKY | Updated at: Aug 14, 2025 01:23 PM IST

Summary

  • Book Building Definition: It is a price discovery mechanism used during an IPO, allowing investors to bid within a specified price band. The final price is decided based on demand.
  • Types of Book Building:
    • 75% Book Building: 75% of the issue is offered through book building, 25% through fixed price.
    • 100% Book Building: Entire issue offered via book building; compulsory for offers above ₹25 crore.
  • Process Overview:
    • The issuer appoints a merchant banker (Book Running Lead Manager – BRLM).
    • A price band is set (e.g., ₹100–₹120).
    • Investors bid for shares at the desired price within the band.
    • After closure, the price is fixed based on demand, and shares are allotted accordingly.
  • Benefits:
    • Efficient price discovery.
    • Transparent bidding process.
    • Allows institutional and retail participation.
  • Market Implication: Encourages fair valuation, improves investor confidence, and increases IPO efficiency.
What is Book Building Process in IPO_
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Book building is a process used by companies to determine the price at which their shares will be offered during an initial public offering (IPO). In this method investors place bids within a specified price range and the final issue price is decided based on the demand received. It helps companies find a fair market price for their shares while ensuring transparency and efficiency in fundraising. In India, book building is regulated by the Securities and Exchange Board of India (SEBI).

What is Book Building Process in IPO?

Book building meaning refers to a process used in IPOs to determine share prices based on investor demand. The company along with its merchant bankers, sets a price band for the shares. During the bidding period, institutional investors, high-net-worth individuals and retail investors place bids stating how many shares they want and at what price within the band. Once the bidding closes, the demand at different price points is analysed to decide the final issue price called the cut-off price. This method ensures fair price determination, transparency and efficient allocation of shares to investors

Example of Book Building: Suppose a company plans to go public and sets a price band of ₹100 to ₹120 per share. Investors place bids based on how many shares they want and at what price within this range. If most bids come in around ₹115 the company may finalise ₹115 as the issue price. This process of collecting investor bids and setting the price based on demand is known as book building.

How Does the Book Building Process Work?

Investors place bids within the given price band during the IPO. Based on demand and bids received, the company sets the final issue price.

Step 1: Hiring an Underwriter

Before an IPO, the company hires an underwriter or a group of underwriters, which are usually investment banks. The basic agenda of the underwriter is to guide the company through the entire book building process of IPO. Right from preparing the necessary documents to marketing the IPO and conducting the book building process. This same underwriter also helps in determining the price range and timing of the offering.

Step 2: Bidding

After the price range is set, institutional investors start bidding for shares within the decided range. This stage lasts for a few days, allowing the company and its underwriters to gather a lot of valuable feedback about the demand for the IPO.

Step 3: Setting the IPO Price

After the bidding period ends, the underwriters assess the demand at various price levels. They evaluate the strength of bids and determine a price that balances demand with the company’s objectives. The final price is then chosen based on the bid spread, with a preference for higher demand at reasonable prices.

Step 4: Allotting Shares

Once the final price is determined, shares are allotted to investors who have placed bids at or above the final price. The shares are then listed on the stock exchange, and the company’s stock begins trading publicly.

Objective of Book Building Process

The primary objective of the book building process is to determine the optimal price for an IPO through investor demand. It helps issuers raise capital efficiently while offering fair price estimation based on market feedback.

  1. To determine the optimal price of shares based on investor demand
  2. To assess market interest accurately
  3. To ensure fair price evaluation of the shares
  4. To help raise the right amount of capital efficiently
  5. To minimize the risk of underpricing or overpricing shares

Types of Book Building

There are several types of book building methods in finance that companies can choose from, depending on their objectives and the market conditions. Widely, you’ll find companies using accelerated and partial book building methods:

Accelerated Book Building

In this method, the company sets a price range for the IPO and invites bids from institutional investors within a very short time frame. The entire process is much faster than the traditional book building approach and is often used when the company has a sense of urgency to raise funds or wants to make a quick splash in the market.

The speed of accelerated book building allows for quicker price discovery, meaning the company can determine the IPO price and start trading in the market almost immediately. If you’re considering book building shares through this method, the price may be set in just a matter of days, which is a pretty rapid pace compared to more traditional approaches.

Partial Book Building

On the other hand, partial book building gives the company a little more control over the pricing process while still involving the market in the decision-making. Here, the company sets a price range and allows a portion of the shares to be priced through bidding by investors. The remaining shares are priced using a fixed-price method, which is more predictable but less flexible.

This method is useful when the company wants to find a balance between book building IPO price flexibility and certainty. The company still gets to gauge market demand through the bidding process for a part of the offering, but it maintains control over the remaining portion. This method is more like a nice blend of both worlds, allowing companies to feel more secure about their IPO pricing while still benefiting from market-driven insights.

Why Do Companies Opt for the Book-Building Process?

Companies choose the book-building process for IPOs because it helps them to know a fair market-driven price for their shares. It also attracts a wide range of participants, improves transparency, and reduces the chances of overpricing or underpricing the issue.

Fair Price Estimation

One of the main reasons companies choose the book-building process in IPO is that it allows for efficient price discovery. This means the company is less likely to end up with shares that are either underpriced or overpriced.

Increased Demand

The book-building process helps attract seasoned institutional investors, creating healthy competition for shares. When demand is strong, the stock is more likely to perform well after listing, making investors feel more confident about buying in.

Better Flexibility

With this approach, the company can adjust the price range based on real-time market conditions and investor interest.

Enhanced Transparency

The final share price is determined by actual market demand and not arbitrarily set by the company, making the entire process more transparent.

Advantages of Book Building

Book building offers a more efficient and transparent way to determine the price of shares during an IPO. It benefits both the issuing company and investors.

  1. Fair Price: Since prices are based on actual investor demand, the final issue price reflects the market’s view, making it more accurate than fixed pricing.
  2. Transparency: The bidding process is clear and regulated, giving all investors equal access to information and participation.
  3. Wider Participation: It allows both institutional and retail investors to bid, increasing reach and market interest.
  4. Efficient Capital Raising: Companies can gauge demand early and adjust pricing or issue size accordingly, leading to more successful fund-raising.
  5. Reduced Risk of Mispricing: Since bids come from actual buyers, the risk of setting a price too high or too low is significantly reduced.

Disadvantages of Book Building

While book building improves price determination, it also has certain disadvantages that can affect both companies and investors.

  1. Limited Transparency for Retail Investors: Retail investors often lack direct access to bidding, and this could make them feel excluded from the price discovery process.
  2. Exclusion of Small Investors: Shares are often allocated primarily to institutional investors. As a result, smaller retail investors may find it more difficult to fully participate in the IPO.
  3. Higher Costs and Fees: Underwriters, who manage the book building process, charge significant fees for their services. For smaller companies, these costs may seem too steep, making them turn towards alternative pricing methods.
  4. Market Volatility and Uncertainty: One of the risks of the book building process is its vulnerability to market volatility. Since the final price is influenced by investor bids, which can fluctuate with market conditions, there’s always the chance that the final price won’t meet the company’s expectations.
  5. Complexity in Pricing: Setting a fair price in a book building IPO requires careful analysis of bids and investor demand, which can be complex for companies without the necessary experience or resources. For companies that are new to the public markets or lack a strong financial team, this process can feel overwhelming.
  6. Risk of Underpricing or Overpricing: The book building process carries the risk of underpricing or overpricing shares. Finding the right balance in pricing is critical, but it requires an in-depth understanding of market dynamics and investor sentiment, making it a delicate process.

Being aware of these book building advantages and disadvantages can guide companies in selecting the most suitable approach for pricing their IPO.

Fixed Pricing vs Book Building

When a company decides to go public, one of the most important decisions it faces is how to price its shares. The two most common methods used for pricing shares during an IPO are fixed pricing and book building. Let’s take a look at the difference between fixed pricing and book building in IPOs. Here’s a table showing some key differences:

Aspect Fixed Pricing Book Building
Pricing Method Company sets a fixed price for shares. Price is determined through bids from investors.
Investor Participation No participation from investors in pricing. Investors participate by submitting bids.
Price Flexibility No flexibility in adjusting the price. Flexible price range based on investor demand.
Risk of Underpricing High risk of underpricing due to lack of feedback from investors. Lower risk of underpricing since the price is driven by demand.
Transparency Lower transparency for investors. Greater transparency due to market-driven pricing.
Speed Faster process, as pricing is predetermined. Longer process due to bidding and analysis.
Market Sensitivity Less responsive to market conditions. More sensitive to market trends and investor sentiment.

In the end, the choice between fixed pricing vs. book building comes down to what the company values more: speed and simplicity or a market-driven approach with better price discovery.

Conclusion

By now, you will have a clearer understanding of the book building IPO meaning, its advantages, limitations and how it compares to other methods like fixed pricing. Think of it like an auction where instead of just setting a price, the company listens to what investors are willing to pay. In an ideal book building example, the company sets a price range and invites institutional investors to place their bids, allowing the market to help decide a fair value for shares. So, if you’re considering participating in an IPO or simply want to stay informed about market trends, understanding how book building works is a crucial first step.

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