• Investors may be wondering if Interactive Brokers Group is still reasonably priced after a strong run, or if the easy value is already gone.
• The stock last closed at US$75.90, with returns of 14.8% over 30 days, 12.9% year to date and 80.5% over 1 year, while the 7 day return was a 4.4% decline.
• Recent headlines have focused on Interactive Brokers Group as a major online brokerage and trading platform, with attention on its role serving active traders and global investors. This context helps explain why the stock has been closely watched during periods of heightened trading activity and changing sentiment toward financial services firms.
• On Simply Wall St's 6 point valuation checklist, Interactive Brokers Group currently scores a 3 out of 6. The next step is to compare what different valuation methods say about the stock and then look at a more complete way of thinking about value that ties everything together later in the article.

Approach 1: Interactive Brokers Group Excess Returns Analysis

The Excess Returns model looks at how much profit a company generates above the return that shareholders require, then capitalizes those excess profits to estimate what the shares could be worth today.

For Interactive Brokers Group, the model starts with a Book Value of $12.54 per share and a Stable EPS estimate of $6.54 per share, based on the median return on equity over the past 5 years. The implied Cost of Equity is $2.76 per share, which leaves an Excess Return of $3.78 per share. That excess is driven by an Average Return on Equity of 19.85% applied to a Stable Book Value estimate of $32.93 per share, based on weighted future book value estimates from 2 analysts.

When these excess returns are projected and discounted, the model arrives at an intrinsic value of about $109.09 per share for Interactive Brokers Group.

Compared with the recent share price of US$75.90, the Excess Returns model implies the stock is 30.4% undervalued on this framework.

Result: UNDERVALUED

Our Excess Returns analysis suggests Interactive Brokers Group is undervalued by 30.4%. Track this in your watchlist or portfolio, or discover 54 more high quality undervalued stocks.

Approach 2: Interactive Brokers Group Price vs Earnings

For profitable companies, the P/E ratio is a practical way to think about value because it links what you pay for each share directly to the earnings that support that share price.

In simple terms, a higher P/E usually reflects higher growth expectations or lower perceived risk, while a lower P/E can signal lower growth expectations or higher risk. So the question is not just whether the P/E is high or low, but whether it matches the company’s growth profile and risk level.

Interactive Brokers Group currently trades on a P/E of 32.58x. That compares with a Capital Markets industry average P/E of 41.69x and a peer group average of 22.72x. Simply Wall St also calculates a proprietary “Fair Ratio” for the P/E, which for Interactive Brokers Group is 19.55x. This Fair Ratio is designed to be more tailored than a simple peer or industry comparison because it incorporates factors such as earnings growth, profit margins, risk profile, industry characteristics and market cap.

When the Fair Ratio of 19.55x is set against the current P/E of 32.58x, the shares screen as overvalued on this multiple based framework.

Result: OVERVALUED

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Upgrade Your Decision Making: Choose your Interactive Brokers Group Narrative

Earlier it was mentioned that there is an even better way to understand valuation. Narratives on Simply Wall St let you attach your own story about Interactive Brokers Group to the numbers by linking your assumptions for future revenue, earnings and margins to a forecast and Fair Value. You can then compare that Fair Value with the current price to guide buy or sell decisions. Each Narrative lives on the Community page, updates when fresh data such as earnings or news arrives, and captures very different views in one place. For example, there might be a cautious Narrative that lines up with a Fair Value close to US$58.09 and a more optimistic Narrative closer to US$85.00. This allows you to quickly see which story fits what you believe and how sensitive your view is to new information.

For Interactive Brokers Group however we will make it really easy for you with previews of two leading Interactive Brokers Group Narratives:

On Simply Wall St, these Narratives sit side by side, which helps you see how different assumptions about growth, profitability and risk translate into very different fair values.

Here is how the current bullish and cautious views compare.

Fair value in this bullish Narrative: US$78.30

Gap to fair value at the last close of US$75.90: about 3.1% undervalued using this Narrative.

Analyst revenue growth input used in this Narrative: 13.54% a year.

• Analysts in this camp expect Interactive Brokers Group to grow revenue at double digit rates while keeping profit margins broadly stable, which feeds into their US$78.30 fair value estimate.
• The story leans on factors such as new products, international expansion, record client balances of US$107.1b and strong new account additions, which together support higher trading and fee based activity.
• Risks center on competition, expansion and regulatory challenges, reliance on trading volumes and uncertainty around interest rates, which could all affect how close reality comes to these forecasts.

Fair value in this more cautious Narrative: US$15.08

Gap to fair value at the last close of US$75.90: about 403.3% overvalued using this Narrative.

Revenue growth input used in this Narrative: 6.28% a year.

• This author focuses on how much of Interactive Brokers Group's profitability currently comes from very high margins and interest income, and frames US$15.08 as a fair value if those conditions ease back toward more conservative assumptions.
• The Narrative highlights competition from both traditional brokers and newer trading and tokenization platforms, along with the possibility that changes in how markets trade could challenge the existing business model.
• A key concern is sensitivity to interest rates and trading volumes, with the view that lower rates or quieter markets could pressure earnings more than bullish investors might expect.

Together, these two Narratives show how different inputs on growth, margins, multiples and market structure can point to very different conclusions about Interactive Brokers Group, and they give you a clear starting point to decide which story is closer to your own view.

Do you think there's more to the story for Interactive Brokers Group? Head over to our Community to see what others are saying!

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.