IBKR vs SNEX

For growth investors, StoneX Group Inc.

(SNEX) is the stronger pick with 32. 5% revenue growth year-over-year, versus 9. 8% for Interactive Brokers Group, Inc. (IBKR). StoneX Group Inc. (SNEX) offers the better valuation at 18. 4x trailing P/E (18. 4x forward), making it the more compelling value choice. Analysts rate Interactive Brokers Group, Inc. (IBKR) a "Buy" — based on 19 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, StoneX Group Inc.

(SNEX) is the cheapest at 18. 4x versus Interactive Brokers Group, Inc. at 37. 8x. On forward P/E, StoneX Group Inc. is actually cheaper at 18. 4x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Interactive Brokers Group, Inc. wins at 1. 18x versus StoneX Group Inc. 's 35. 65x — a reasonable growth-adjusted valuation.

Over the past 5 years, StoneX Group Inc.

(SNEX) delivered a total return of +489. 4%, compared to +384. 2% for Interactive Brokers Group, Inc. (IBKR). Over 10 years, the gap is even starker: SNEX returned +1239% versus IBKR's +857. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), StoneX Group Inc.

(SNEX) is the lower-risk stock at 1. 08β versus Interactive Brokers Group, Inc. 's 1. 93β — meaning IBKR is approximately 79% more volatile than SNEX relative to the S&P 500. On balance sheet safety, Interactive Brokers Group, Inc. (IBKR) carries a lower debt/equity ratio of 0% versus 8% for StoneX Group Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), StoneX Group Inc.

(SNEX) is pulling ahead at 32. 5% versus 9. 8% for Interactive Brokers Group, Inc. (IBKR). On earnings-per-share growth, the picture is similar: Interactive Brokers Group, Inc. grew EPS 28. 3% year-over-year, compared to 10. 9% for StoneX Group Inc.. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Interactive Brokers Group, Inc.

(IBKR) is the more profitable company, earning 9. 6% net margin versus 0. 2% for StoneX Group Inc. — meaning it keeps 9. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: SNEX leads at 99. 1% versus 86. 0% for IBKR. At the gross margin level — before operating expenses — SNEX leads at 99. 2%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Interactive Brokers Group, Inc. (IBKR) is the more undervalued stock at a PEG of 1. 18x versus StoneX Group Inc. 's 35. 65x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, StoneX Group Inc. (SNEX) trades at 18. 4x forward P/E versus 34. 9x for Interactive Brokers Group, Inc. — 16. 5x cheaper on a one-year earnings basis.

All stocks in this comparison pay dividends.

StoneX Group Inc. (SNEX) offers the highest yield at 3. 3%, versus 0. 4% for Interactive Brokers Group, Inc. (IBKR).

For long-horizon retirement investors, StoneX Group Inc.

(SNEX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 08), 3. 3% yield, +1239% 10Y return). Interactive Brokers Group, Inc. (IBKR) carries a higher beta of 1. 93 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (SNEX: +1239%, IBKR: +857. 9%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Financial Services sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: IBKR is a mid-cap quality compounder stock; SNEX is a small-cap high-growth stock. SNEX pays a dividend while IBKR does not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.