NUKK vs IBKR vs LPLA vs NDAQ vs MKTX

For growth investors, LPL Financial Holdings Inc.

(LPLA) is the stronger pick with 37. 2% revenue growth year-over-year, versus -63. 5% for Nukkleus Inc. (NUKK). MarketAxess Holdings Inc. (MKTX) offers the better valuation at 22. 9x trailing P/E (18. 6x 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, MarketAxess Holdings Inc.

(MKTX) is the cheapest at 22. 9x 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 MarketAxess Holdings Inc. 's 3. 03x — a reasonable growth-adjusted valuation.

Over the past 5 years, Interactive Brokers Group, Inc.

(IBKR) delivered a total return of +386. 1%, compared to -97. 8% for Nukkleus Inc. (NUKK). Over 10 years, the gap is even starker: LPLA returned +1241% versus NUKK's -97. 7%. 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), MarketAxess Holdings Inc.

(MKTX) is the lower-risk stock at -0. 28β versus Nukkleus Inc. 's 2. 26β — meaning NUKK is approximately -904% more volatile than MKTX relative to the S&P 500. On balance sheet safety, Interactive Brokers Group, Inc. (IBKR) carries a lower debt/equity ratio of 0% versus 136% for LPL Financial Holdings 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 -63. 5% for Nukkleus Inc. (NUKK). On earnings-per-share growth, the picture is similar: Nukkleus Inc. grew EPS 64. 4% 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.

MarketAxess Holdings Inc.

(MKTX) is the more profitable company, earning 29. 0% net margin versus -144. 1% for Nukkleus Inc. — meaning it keeps 29. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: IBKR leads at 86. 0% versus -239. 8% for NUKK. 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 MarketAxess Holdings Inc. 's 3. 03x. 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, MKTX (2.

0% yield), NDAQ (1. 2% yield), LPLA (0. 4% yield), IBKR (0. 4% yield) pay a dividend. NUKK does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, MarketAxess Holdings Inc.

(MKTX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β -0. 28), 2. 0% yield). Nukkleus Inc. (NUKK) carries a higher beta of 2. 26 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (MKTX: +38. 3%, NUKK: -97. 7%), 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.

These companies operate in different sectors (NUKK (Technology) and IBKR (Financial Services) and LPLA (Financial Services) and NDAQ (Financial Services) and MKTX (Financial Services)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: NUKK is a small-cap quality compounder stock; IBKR is a mid-cap quality compounder stock; LPLA is a mid-cap high-growth stock; NDAQ is a mid-cap quality compounder stock; MKTX is a small-cap quality compounder stock. NDAQ, MKTX pay a dividend while NUKK, 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.