What Are Marketable Securities? Definition and How to Invest

Marketable securities are highly liquid investments, making them ideal for building an investment portfolio.

What Are Marketable Securities?
Updated Jan 20, 2025 Fact Checked

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Written by Conor Richardson
Edited by Conor Richardson

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Takeaways

  • Stocks, bonds, and ETFs are three commonly held marketable securities.
  • Marketable securities have a maturity period of one year or less.
  • Marketable securities are bought and sold on public stock or bond exchanges.
  • Marketable securities are less risky because they can quickly be converted into cash.
  • Companies purchase marketable securities to help manage cash flow and short-term investments.

What Are Marketable Securities?

Marketable securities are financial instruments that can be easily traded in secondary markets. They are typically characterized by their liquidity, which allows investors to buy or sell them quickly on the open market.

Marketable securities are a group of specific assets that can be converted into cash rapidly without diminishing their market value. This makes them highly attractive investment opportunities because investors can earn money through interest payments or capital appreciation based on the security. You can purchase these assets through your online stock brokerage account.

Marketable securities have a maturity of one year or less, can be bought and sold on an exchange (stock or bond), and are highly liquid. A clear understanding of marketable securities and how they function is critical for investors looking to craft a diversified and dynamic investment portfolio.

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The three primary types of marketable securities are common stock, ETFs, and bonds. Each has unique traits that make it suitable for mitigating risk in a portfolio.

Common Stocks

When people think about trading stocks and the stock market, such as the NASDAQ or NYSE, they visualize trading common stocks. Common stock is a type of marketable security that represents a piece of ownership in a company. When you buy common stock, you are a “shareholder” of that company. A share gives you the ability to increase your net worth through capital appreciation or dividend payments.

Stock investors also usually have voting rights, which allow them to participate in vital company decisions during shareholder meetings. These could include the right to vote on a board of directors or merger or acquisition decisions. The value of common stocks changes based on macroeconomic conditions, industry risk, and company performance.

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Exchange-Traded Funds (ETFs)

ETFs, or exchange-traded funds, are a newer and popular form of marketable security.[1] ETFs are special investment funds that are traded on stock markets just like stocks. However, they offer greater diversification because each fund holds a collection of assets, and as an investor in the EFT, you buy a share of the ETF.

Exchange-traded funds can focus on investing in different asset classes but concentrate their investment focus mainly on stocks, bonds, or commodities. Ready to invest? Follow these 5 steps to invest in your first ETF.

Investors can trade ETFs intra-day on the open market, allowing them to get the best of both worlds: liquidity and diversification. ETFs have highly specific investment objectives and can invest in specific asset classes, industrial sectors, or types of businesses.

For example, you can find ETFs focused exclusively on artificial intelligence, healthcare, microchips, or gasoline companies. Since sophisticated fund managers create ETFs, they tend to generate better returns than individual stocks with low transaction fees and broad market exposure.

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Bonds

Interest in investing in bonds ebbs and flows based on interest rates. More recently, bonds have soared in popularity due to rising interest rates and inflation. Unlike stocks, bonds represent debt ownership rather than equity ownership.

When you buy a bond, you are making a loan to the bond issuer in exchange for periodic interest payments and the return of the principal amount when the bond matures. Many companies and government entities issue bonds to help raise debt capital and finance projects, new product launches, or company expansion plans. Investors can explore many different types of bonds to see which one best aligns with their investing goals.

Because bonds pay interest, they are popular among fixed-income investors, such as people nearing retirement. Fixed-income investors also use bonds to create bond ladders to generate a consistent stream of passive income.

Learn more about the Federal Reserve and how the federal funds rate affects interest rates.

Advantage of Marketable Securities

Investing in marketable securities offers significant advantages that appeal to a wide range of investors. The most cited advantage is liquidity. This liquidity means you can trade your stock, bond, or ETF investment and quickly convert it into cash. This flexibility lets you plan your cash flow needs or respond to changing market conditions.

Diversification is another massive benefit. Not only do individual investments into marketable securities like stocks and bonds help diversify your portfolio, but because they are short-term (one year or less), you can use these investments to expose your portfolio to these short-term investments while augmenting for long-term exposure through U.S. bonds or notes. This means they can reduce the impact of poor performance in the short term and make your investments stable over time.

Additionally, marketable securities tend to offer competitive returns. Bonds provide fixed income, and stocks have the potential for capital appreciation. ETFs bring a collection of assets to a single ticker, letting you diversify with a single transaction.

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Disadvantage of Marketable Securities

Even though marketable securities offer significant advantages, they do have drawbacks. One of the biggest disadvantages is that they are all vulnerable to market volatility, which can pose a risk of short-term losses.

That same volatility can diminish the liquidity of assets, making it challenging to sell an investment at desired prices. Finally, some marketable securities, like options or derivatives, are far too complex for the average investor to understand without more education.[2]

Smart Summary

Investing is about building a well-rounded and diversified investment portfolio. Most financial advisors will tell you marketable securities should have a place in your portfolio. This means analyzing the investment you are selecting, its time horizon, your risk tolerance, and how you are optimizing your portfolio. Regularly monitoring investments can be mentally taxing, so automating your finances or using a robo-advisor to help you manage your portfolio can relieve financial stress and boost investment returns.

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Sources

(1) U.S. Securities and Exchange Commission. Exchange-Traded Funds (ETFs). Last Accessed January 20, 2025.

(2) U.S. Securities and Exchange Commission. Derivatives. Last Accessed January 20, 2025.

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