Sifting through countless of stocks in the Capital Markets industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Marex Group plc or StoneX Group Inc. because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Marex Group plc and StoneX Group Inc. compare based on key financial metrics to determine which better meets your investment needs.

About Marex Group plc and StoneX Group Inc.

Marex Group plc, a financial services platform company, provides liquidity, market access, and infrastructure services to clients in the commodity and financial markets in the United Kingdom, the United States, and internationally. It operates through Clearing, Agency and Execution, Market Making, and Hedging and Investment Solutions segments. The company offers execution and clearing services in metals, agricultural products, energy and fixed income, financial securities, digital assets, and equity futures and options; liquidity, execution, and risk management solutions to financial markets. It also provides liquidity to clients in the OTC energy markets; market data, analytics, and market commentary; energy services, including gas, power, environmental, and crude oil markets; and market-making services across commodities markets, such as metals, agricultural products, and energy markets. In addition, the company offers OTC traded hedging and customized OTC derivatives solutions; and risk management solutions across a spectrum of markets, including agriculture, currency, and interest rate markets for trading houses, producers and consumers, and banks and distributors. Further, it engages in the structured notes business, which allows investors to build structured notes across asset classes, including commodities, equities, foreign exchange, and fixed-income products for private banks, independent asset managers, pension funds, and corporates; and a portfolio of structured Notes, including auto-callable, fixed, stability, and credit-linked notes. Additionally, the company offers technology platforms, including Neon, a trading, risk, and data platform; and Agile, a commodity broking platform. Marex Group plc was incorporated in 2005 and is based in London, the United Kingdom.

StoneX Group Inc. operates as a global financial services network that connects companies, organizations, traders, and investors to a market ecosystem in the United States, Europe, South America, the Middle East, Asia, and internationally. The company operates through four segments: Commercial, Institutional, Self-Directed/Retail, and Payments. The Commercial segment provides risk management and hedging, voice brokerage, market intelligence, physical trading, and commodity financing, marketing, procurement, logistics, and price management services; and engages in the risk management and hedging services, execution and clearing of exchange-traded and OTC products. This segment also acts as an institutional dealer in fixed income securities to serve asset managers, commercial bank trust and investment departments, broker-dealers, and insurance companies; and engages in asset management business. The Self-Directed/Retail segment provides trading services and solutions in the global financial markets, including spot foreign exchange, precious metals trading, contracts for differences, and spread bets; and wealth management services, as well as offering physical gold and other precious metals in various forms and denominations through Stonexbullion.com. The company was formerly known as INTL FCStone Inc. and changed its name to StoneX Group Inc. in July 2020. StoneX Group Inc. was founded in 1924 and is headquartered in New York, New York.

Latest Capital Markets and Marex Group plc, StoneX Group Inc. Stock News

As of April 14, 2026, Marex Group plc had a $3.8 billion market capitalization, compared to the Capital Markets median of $3.6 million. Marex Group plc’s stock is up 35.6% in 2026, up 6.2% in the previous five trading days and up 41.92% in the past year.

Currently, Marex Group plc’s price-earnings ratio is 13.8. Marex Group plc’s trailing 12-month revenue is $2.9 billion with a 10.7% net profit margin. Year-over-year quarterly sales growth most recently was -40.6%. Analysts expect adjusted earnings to reach $4.746 per share for the current fiscal year. Marex Group plc currently has a 1.1% dividend yield.

As of April 14, 2026, StoneX Group Inc. had a $8.0 billion market cap, putting it in the 74th percentile of all stocks. StoneX Group Inc.’s stock is up 61.4% in 2026, up 11.7% in the previous five trading days and up 107.28% in the past year.

Currently, StoneX Group Inc.’s price-earnings ratio is 22.7. StoneX Group Inc.’s trailing 12-month revenue is $141.8 billion with a 0.3% net profit margin. Year-over-year quarterly sales growth most recently was 39.6%. Analysts expect adjusted earnings to reach $5.540 per share for the current fiscal year. StoneX Group Inc. does not currently pay a dividend.

How We Compare Marex Group plc and StoneX Group Inc. Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Marex Group plc and StoneX Group Inc.’s stock grades to see how they measure up against one another.

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Marex Group plc and StoneX Group Inc. Growth Grades

Company	Ticker	Growth
Marex Group plc	MRX	B
StoneX Group Inc.	SNEX	F

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Marex Group plc has a Growth Score of 69, which is Strong. StoneX Group Inc. has a Growth Score of 16, which is Very Weak.

The Growth Grade Winner: Marex Group plc

As you can clearly see from the Growth Grade breakdown above, Marex Group plc has a more attractive growth grade than StoneX Group Inc.. For investors who focus solely on how a company is growing relative to other companies in the same industry, Marex Group plc could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Marex Group plc and StoneX Group Inc.’s Quality Grades

Company	Ticker	Quality
Marex Group plc	MRX	F
StoneX Group Inc.	SNEX	D

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Marex Group plc has a Quality Score of 19, which is Very Weak. StoneX Group Inc. has a Quality Score of 24, which is Weak.

The Quality Stock Winner: No Clear Winner

Neither Marex Group plc or StoneX Group Inc. has a high enough Quality Grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Marex Group plc or StoneX Group Inc. is the better investment when it comes to quality.

Marex Group plc and StoneX Group Inc.’s Momentum Grades

Company	Ticker	Momentum
Marex Group plc	MRX	B
StoneX Group Inc.	SNEX	A

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Marex Group plc has a Momentum Score of 79, which is Strong. StoneX Group Inc. has a Momentum Score of 89, which is Very Strong.

The Momentum Grade Winner: StoneX Group Inc.

As you can clearly see from the Momentum Grade breakdown above, StoneX Group Inc. is considered to have stronger momentum compared to Marex Group plc. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, StoneX Group Inc. could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Marex Group plc and StoneX Group Inc. Grades

In addition to Quality, Momentum and Growth, A+ Investor also provides grades for Value and Estimate Revisions.

Earnings estimate revisions scores take into account the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, surprises beget further surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Marex Group plc and StoneX Group Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Marex Group plc or StoneX Group Inc. Stock?

Overall, Marex Group plc stock has a Growth Score of 69, Momentum Score of 79 and Quality Score of 19.

StoneX Group Inc. stock has a Growth Score of 16, Momentum Score of 89 and Quality Score of 24.

Comparing Marex Group plc and StoneX Group Inc.’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.