Indication of Interest

Investment Banking
advanced
4 min read
Updated Mar 1, 2024

What Is an Indication of Interest (IOI)?

An Indication of Interest (IOI) is a non-binding expression of interest by an investor to purchase a security, typically used during the book-building process of an IPO or for large block trades.

An Indication of Interest (IOI) is essentially a "soft order." It allows an investor to signal their desire to buy a security without legally committing to the purchase. This mechanism is crucial in markets where price discovery is ongoing or where liquidity is scarce. The most common context is an **Initial Public Offering (IPO)**. Before a company goes public, underwriters (investment banks) conduct a "roadshow" to pitch the stock to institutional investors. Investors respond with IOIs, stating how many shares they *might* buy and at what price range. The bankers collect these IOIs to build a "book" of demand, which helps them set the final IPO price. In secondary markets, IOIs are used by brokers to advertise liquidity. A broker might send an IOI to clients saying, "I have a seller for 50,000 shares of XYZ." This alerts potential buyers without displaying the order on the public exchange, protecting the price from slipping.

Key Takeaways

  • It is a conditional, non-binding offer to buy securities.
  • Used extensively during the IPO "roadshow" to gauge demand.
  • Helps underwriters determine the final offering price.
  • Institutional traders use IOIs to find liquidity for large block trades without moving the market.
  • IOIs can be converted into firm orders, but investors can back out without penalty.

The Role in Book Building

The "Book Building" process relies entirely on IOIs. 1. **Pitch**: Bankers market the IPO with a price range (e.g., $18-$21). 2. **Feedback**: Investors submit IOIs. "I'm interested in 100k shares at $19." 3. **Aggregation**: The banker sees the book is "oversubscribed" (more IOIs than shares). 4. **Pricing**: Because demand is high, they might price the IPO at $21 or even $22. 5. **Allocation**: The IOIs are converted to firm allocations. Crucially, investors can cancel their IOI before the final pricing if they think the price has gone too high.

IOIs in Electronic Trading

In modern electronic trading, IOIs are digital messages sent over networks like FIX (Financial Information eXchange). * **Natural IOI**: Represents a real client order waiting to be filled. * **Super IOI**: An IOI that targets specific firms likely to take the other side. These are critical for "dark pool" liquidity, helping institutions match large buyers and sellers anonymously.

Real-World Example: The Hot IPO

Tech Company X is going public. The underwriter sets a range of $20-$25. Hedge Fund A submits an IOI for 1 million shares. Pension Fund B submits an IOI for 2 million shares. Total IOIs amount to 50 million shares, but only 10 million are being sold (5x oversubscribed).

1Step 1: Underwriter sees massive demand.
2Step 2: They price the IPO at the top of the range ($25).
3Step 3: They allocate shares. Hedge Fund A might only get 200k shares (pro-rated).
4Step 4: The IOI was the signal that allowed the bank to maximize the price.
Result: Without IOIs, the bank would be guessing at the market clearing price.

IOI vs. Firm Order

The key differences between an indication and a commitment.

FeatureIndication of Interest (IOI)Firm Order
Binding?No (Non-binding)Yes (Legally binding)
PriceOften a range or "market"Specific limit or market
PurposeGauge demand / Find liquidityExecute a trade
PenaltyNone for cancellingMust settle trade

FAQs

Yes. An IOI is non-binding. You can withdraw it at any time before it is converted into a firm order. However, repeatedly submitting IOIs and backing out ("flaking") can damage your reputation with brokers, leading to poor allocations in future deals.

In an IPO, only the underwriters see the book. In secondary markets, brokers send IOIs to a select list of clients or over private networks. They are generally not visible on the public "tape" or Level 2 data seen by retail traders.

It is a regulatory allowance (under the JOBS Act) for companies to solicit IOIs from institutional investors *before* filing full IPO paperwork with the SEC. This helps companies decide if going public is worth the effort.

Generally, no. Retail investors place firm orders. IOIs are tools for institutions and brokers dealing in size or negotiating private market deals.

The Bottom Line

An Indication of Interest is the "conversation" before the trade. In the high-stakes world of IPOs and block trading, it allows buyers and sellers to find each other and negotiate price without showing their full hand to the public market. It is the mechanism of price discovery for assets that don't have a continuous live price. For institutional investors, mastering the use of IOIs is key to securing allocations in hot deals and sourcing liquidity for large positions. For the retail investor, understanding IOIs sheds light on how IPO prices are determined—not by a computer algorithm, but by a collection of non-binding handshakes that solidify into a market price.

At a Glance

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Reading Time4 min

Key Takeaways

  • It is a conditional, non-binding offer to buy securities.
  • Used extensively during the IPO "roadshow" to gauge demand.
  • Helps underwriters determine the final offering price.
  • Institutional traders use IOIs to find liquidity for large block trades without moving the market.