SIEB vs SNEX vs IBKR vs LPLA

For growth investors, LPL Financial Holdings Inc.

(LPLA) is the stronger pick with 37. 2% revenue growth year-over-year, versus 9. 8% for Interactive Brokers Group, Inc. (IBKR). Siebert Financial Corp. (SIEB) offers the better valuation at 5. 4x trailing P/E, making it the more compelling value choice. Analysts rate StoneX Group Inc. (SNEX) a "Buy" — based on 2 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, Siebert Financial Corp.

(SIEB) is the cheapest at 5. 4x versus Interactive Brokers Group, Inc. at 37. 7x. On forward P/E, LPL Financial Holdings Inc. is actually cheaper at 13. 8x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: LPL Financial Holdings Inc. wins at 1. 04x versus StoneX Group Inc. 's 2. 33x — a reasonable growth-adjusted valuation.

Over the past 5 years, StoneX Group Inc.

(SNEX) delivered a total return of +547. 9%, compared to -49. 4% for Siebert Financial Corp. (SIEB). Over 10 years, the gap is even starker: SNEX returned +1454% versus SIEB's +67. 2%. 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), LPL Financial Holdings Inc.

(LPLA) is pulling ahead at 37. 2% versus 9. 8% for Interactive Brokers Group, Inc. (IBKR). On earnings-per-share growth, the picture is similar: Siebert Financial Corp. grew EPS 57. 1% year-over-year, compared to -22. 2% for LPL Financial Holdings 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.

Siebert Financial Corp.

(SIEB) is the more profitable company, earning 16. 5% net margin versus 0. 2% for StoneX Group Inc. — meaning it keeps 16. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: IBKR leads at 86. 0% versus 1. 6% for SNEX. At the gross margin level — before operating expenses — IBKR leads at 89. 8%, 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, LPL Financial Holdings Inc. (LPLA) is the more undervalued stock at a PEG of 1. 04x versus StoneX Group Inc. 's 2. 33x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, LPL Financial Holdings Inc. (LPLA) trades at 13. 8x forward P/E versus 33. 6x for Interactive Brokers Group, Inc. — 19. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for LPLA: 42. 4% to $441. 00.

In this comparison, SNEX (2.

9% yield), LPLA (0. 4% yield), IBKR (0. 4% yield) pay a dividend. SIEB does not pay a meaningful dividend and should not be held primarily for income.

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), 2. 9% yield, +1454% 10Y return). Siebert Financial Corp. (SIEB) carries a higher beta of 1. 58 — 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: +1454%, SIEB: +67. 2%), 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: SIEB is a small-cap high-growth stock; SNEX is a small-cap high-growth stock; IBKR is a mid-cap quality compounder stock; LPLA is a mid-cap high-growth stock. SNEX pays a dividend while SIEB, IBKR, LPLA do 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.