Fairness Opinions Explained: What They Are and How to Talk About Them in IB Interviews

A fairness opinion is a letter from an investment bank telling a company's board that the price in a deal is fair, from a financial point of view, to the company's shareholders. That's it in one sentence.

But behind that one sentence sits a lot of valuation work, some legal history, and a few conflict-of-interest debates that interviewers love to poke at. If you're recruiting for M&A, this is a topic where a crisp, confident answer makes you sound like someone who's already sat in a board meeting.

Let's break it down.

What Is a Fairness Opinion, Really?

When a company agrees to be sold, its board of directors has a duty to act in the best interests of shareholders. Directors aren't valuation experts, so they hire a financial advisor to do the math and give them an independent-ish view.

The fairness opinion is the formal output of that work. It's usually:

• Delivered orally at the board meeting where the deal is approved
• Confirmed in a short written letter (often just a few pages) dated the same day
• Summarized in the proxy statement sent to shareholders, typically in a section called something like "Opinion of [Bank Name]"

The Magic Phrase: "From a Financial Point of View"

This wording matters, and interviewers know it. A fairness opinion only covers the financial terms of the deal, meaning the consideration shareholders receive.

It does not say:

• That the price is the highest possible price
• That shareholders should vote for the deal
• That the deal makes strategic sense
• That the bank has independently verified the company's projections

Think of it as the bank saying, "Based on the numbers we were given and the analyses we ran, this price falls within a reasonable range of value." Nothing more.

Why Do Fairness Opinions Exist?

The Legal Backdrop

The big catalyst was a 1985 Delaware Supreme Court case, Smith v. Van Gorkom. The court found that the directors of Trans Union had breached their duty of care, in part because they approved a sale without being adequately informed about the company's value.

After that ruling, boards got nervous. Getting a fairness opinion from a reputable bank became standard practice as evidence that directors did their homework. It isn't legally required in most deals, but you'll rarely see a public company sale without one.

What the Board Actually Gets

For the board, the opinion is a form of process protection. It shows that:

• Directors sought expert financial advice
• They considered value carefully before approving the deal
• Their decision rested on an informed basis

In other words, it helps the board defend its decision if shareholders sue later, which, in public M&A, happens often.

Who Gets a Fairness Opinion?

Most fairness opinions are given on the sell-side, to the target's board (or a special committee of independent directors when there's a conflict, like a management buyout).

Buy-side fairness opinions exist too. An acquirer's board might get one stating that the price it's paying is fair to its shareholders. These are more common when the deal is large relative to the buyer or when the buyer is issuing enough stock that its own shareholders need to vote.

How Banks Build a Fairness Opinion

Here's where your technical skills come in. The bank runs the same valuation toolkit you've been studying, then lays the results out on a football field chart.

Typical analyses include:

• Comparable company analysis (trading multiples of similar public companies)
• Precedent transactions (multiples paid in similar past deals)
• Discounted cash flow (DCF) analysis, usually based on management's projections
• LBO analysis (what a financial sponsor could afford to pay)
• Premiums paid analysis (how the offer premium compares to premiums in similar deals)
• 52-week trading range (usually shown "for reference only," not as a core valuation method)

A Worked Example

Say a buyer offers $40.00 per share for a target whose unaffected share price was $30.00.

First, the premium:

• ($40.00 − $30.00) ÷ $30.00 = 33.3% premium

Now the bank's football field might look like this:

How to read it: The $40.00 offer sits above the comps and LBO ranges, near the middle of precedents, and inside the DCF range. It's also well above where the stock has traded over the past year.

That picture supports a conclusion that $40.00 is fair from a financial point of view. If the offer were $31.00, sitting below most ranges, the bank would have a hard time getting there.

The Fairness Committee

Before any opinion goes out, it typically has to pass the bank's internal fairness committee, a group of senior bankers not working on the deal. They review the analyses, challenge assumptions, and sign off. As an analyst, expect late nights preparing materials for this review.

The Controversy: Conflicts of Interest

This is the part interviewers like to test, because it shows you understand the real world and not just the textbook.

Conflict #1: Who's Writing the Opinion?

Often, the same bank that advised on the deal also provides the fairness opinion. That bank usually earns a big success fee only if the deal closes. So there's an obvious question: would a bank really say "not fair" and torpedo its own payday?

Banks address this in a few ways:

• The fairness opinion fee is often a separate, smaller fee payable when the opinion is delivered, regardless of the conclusion
• The internal fairness committee adds a layer of review
• Boards sometimes hire a second bank solely to give an independent fairness opinion, with no success fee attached

Conflict #2: Disclosure Rules

FINRA Rule 5150 requires member firms to disclose certain conflicts in fairness opinions, including whether their compensation depends on the deal closing and whether they've had other material relationships with the parties. That's why proxy statements list how much the bank is getting paid and what other work it's done for the buyer or seller.

Conflict #3: Courts Are Watching

Delaware courts have scrutinized advisor conflicts closely. In the Rural/Metro litigation, RBC Capital Markets was held liable for aiding and abetting the board's breach of duty, partly because of how it handled its own conflicts during the sale process. The case was a wake-up call that banks themselves can face real liability.

How to Answer Fairness Opinion Questions in Interviews

"What is a fairness opinion?"

Keep it tight:

"It's a letter from a financial advisor to a company's board stating whether the consideration in a transaction is fair, from a financial point of view, to the company's shareholders. It's backed by valuation analyses like comps, precedents, and a DCF, and it helps the board show it made an informed decision."

"Does a fairness opinion mean the price is the best one available?"

No. It only says the price falls within a reasonable range. A deal can be "fair" while a higher bid was theoretically possible.

"Why might a fairness opinion be criticized?"

Hit the conflict point:

• The advisor often earns a success fee contingent on the deal closing
• The opinion relies on management's projections, which the bank doesn't independently verify
• "Fair" is a range, so it can feel like a low bar

Then show balance: mention second opinions, fairness committees, and FINRA disclosure requirements as safeguards.

"Walk me through how you'd support a fairness opinion."

Describe the football field. Name the methodologies, explain that you'd compare the offer price against each implied range, and note that the 52-week range and analyst price targets are usually shown for reference rather than as core valuation methods.

Quick Recap

• A fairness opinion says a deal's price is fair from a financial point of view, nothing more
• It became standard after Smith v. Van Gorkom pushed boards to be better informed
• Banks support it with comps, precedents, DCF, LBO, and premiums analysis on a football field
• The big criticism is conflicts of interest, especially contingent success fees
• In interviews, know the definition cold, know what it doesn't say, and be ready to discuss the conflicts with nuance

Nail this topic and you'll show interviewers you understand not just how to value a company, but how valuation actually gets used when a board is deciding whether to sell.