The different types of securities recognized under federal law fall into six broad families: equity securities like stocks, debt securities like bonds, hybrid instruments that blend the two, investment company shares such as mutual funds and ETFs, derivatives tied to an underlying asset, and asset-backed securities created by pooling loans. Each category carries its own ownership rights, payment priority, tax treatment, and regulatory oversight, and the Securities Act of 1933 casts a wide net so that new financial products get pulled in as they emerge.
How Federal Law Defines a Security
The Securities Act of 1933 lists the instruments that count as securities, and the list is deliberately broad. It includes stocks, bonds, notes, debentures, investment contracts, options, warrants, and certificates of deposit for securities, along with a catchall for “any interest or instrument commonly known as a security.”1Office of the Law Revision Counsel. 15 USC 77b – Definitions; Promotion of Efficiency, Competition, and Capital Formation Congress wrote the definition wide on purpose, wanting it to cover financial products that had not yet been invented in the 1930s.
For arrangements that do not fit the statutory list, courts apply a test from the Supreme Court’s 1946 decision in SEC v. W.J. Howey Co. An investment contract qualifies as a security when someone invests money in a common enterprise and expects profits to come from the efforts of a promoter or third party.2Justia Law. SEC v. Howey Co., 328 US 293 (1946) That test is how regulators reach newer products such as certain cryptocurrency tokens and crowdfunding interests. If the economics look like a security, the label on the package does not matter.
Once an instrument meets the definition, the issuer generally must register it with the SEC and provide detailed financial disclosures before offering it to the public. Some categories of securities and some offering structures are exempt, discussed further below.
Equity Securities
Equity securities represent ownership in a corporation. Common stock is the familiar form and usually carries voting rights, letting shareholders elect board members and weigh in on major corporate decisions. Preferred stock sits in a different legal space: holders receive a fixed dividend that gets paid before common stockholders see anything, but preferred shares typically come without voting power. Both types give the holder a stake in the company’s net value.
Publicly traded companies must file annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K whenever certain events occur.3U.S. Securities and Exchange Commission. Form 10-K Those filings give equity holders ongoing visibility into the company’s financial health, management pay, and risk factors. Dividends are distributions of corporate profits, but a company has no obligation to pay them unless the board formally declares one.
If you hold common stock and want to push for changes, federal rules let you submit a proposal for the company’s annual proxy ballot. Someone who has continuously held at least $25,000 in market value for one year qualifies, while a smaller holder with at least $2,000 worth of shares needs a three-year track record.4U.S. Securities and Exchange Commission. Shareholder Proposals You cannot pool shares with other investors to reach the threshold.
In a corporate liquidation, equity holders sit at the back of the line. Creditors and bondholders get paid first, and shareholders divide whatever remains. That priority structure is the tradeoff for the unlimited upside equity ownership provides.
Debt Securities
Debt securities create a creditor relationship. The investor lends money to the issuer, and the issuer agrees to repay it with interest by a set date. Bonds and debentures are the most common forms, with the issuer making periodic interest payments at a fixed or floating rate and returning principal on the maturity date regardless of whether the company turns a profit that year. That contractual obligation is what makes debt fundamentally different from equity.
When a company issues bonds worth more than a certain threshold to the public, federal law requires a trust indenture, a formal agreement spelling out the issuer’s obligations and appointing an independent trustee to look out for bondholders. The trustee monitors compliance and, if the issuer defaults, can take action to protect investors’ interests, including seizing collateral. Bank-issued certificates of deposit are another form of debt security, insured up to $250,000 per depositor, per insured bank, for each ownership category by the FDIC.5FDIC. Deposit Insurance at a Glance
Debt holders enjoy priority over equity holders in bankruptcy. Secured creditors get paid first from their collateral, then unsecured creditors, and shareholders receive anything only after those groups are made whole. That higher standing is why bonds are generally considered less risky than stocks for the same issuer.
Credit Ratings
Before buying a bond, most investors look at its credit rating. The SEC registers the firms allowed to issue these ratings as Nationally Recognized Statistical Rating Organizations. The current list includes S&P Global Ratings, Moody’s Investors Service, Fitch Ratings, and several smaller agencies.6U.S. Securities and Exchange Commission. Current NRSROs Their ratings influence both the interest rate an issuer must pay and the pool of investors eligible to buy the bonds. A downgrade can spike borrowing costs overnight.
Default
Missing a scheduled interest or principal payment is a default, and creditors then have the right to accelerate the full balance, seize pledged collateral, or force the issuer into bankruptcy proceedings. Investors who lose money because an issuer lied about its financial condition can pursue class-action litigation under the Securities Exchange Act, and the SEC can bring civil enforcement actions seeking disgorgement and monetary penalties.7U.S. Securities and Exchange Commission. Enforcement and Litigation
Hybrid Securities
Hybrid securities blend characteristics of both debt and equity into a single instrument. The most common example is the convertible bond. You start out as a creditor collecting interest payments, but you hold the right to convert the bond into a specified number of the company’s shares if the stock price makes that attractive. The structure gives you downside protection through fixed payments while preserving access to the upside if the company grows.
Preferred shares with mandatory redemption dates also fall into this category. They behave like debt because the issuer must buy them back on a set schedule, yet they pay dividends rather than interest and sit in the equity section of the balance sheet until redemption. In a liquidation, hybrids typically rank below senior debt but above common stock.
Companies use hybrids to raise capital without immediately diluting existing shareholders or paying the higher rates that come with traditional bonds. The legal documentation must spell out exactly when and how conversion happens, what triggers early redemption, and where the holder stands relative to other creditors if the issuer fails. Regulators require marketing materials to reflect this complexity accurately, because the risk profile is harder for an average investor to evaluate than a plain bond or stock.
Investment Company Securities
When you buy shares of a mutual fund or an exchange-traded fund, you are buying a security issued by an investment company. Federal law classifies investment companies into three types: management companies, unit investment trusts, and face-amount certificate companies.8Office of the Law Revision Counsel. 15 U.S. Code 80a-4 – Classification of Investment Companies Almost everything retail investors encounter falls into the first category.
Management companies split further into open-end and closed-end funds. Open-end funds, which include traditional mutual funds and most ETFs, continuously issue and redeem shares based on the fund’s net asset value. You buy mutual fund shares directly from the fund at the price calculated after the market closes each day. ETFs trade throughout the day on stock exchanges at market prices that can drift slightly above or below net asset value. Closed-end funds sell a fixed number of shares in an initial offering, and those shares then trade on an exchange like stocks.9U.S. Securities and Exchange Commission. Mutual Funds and ETFs – A Guide for Investors
Investment companies must register with the SEC and follow detailed rules on governance, fee disclosure, and portfolio diversification.10U.S. Securities and Exchange Commission. Investment Company Registration and Regulation Package Those rules exist because fund investors are one step removed from the underlying stocks or bonds. They are trusting a portfolio manager to make decisions with their money, which is exactly the kind of arrangement securities laws are designed to regulate.
Derivative Securities
Derivative securities are contracts whose value is tied to an underlying asset such as a stock, commodity, or interest rate. Options give you the right, but not the obligation, to buy or sell an asset at a set price before a certain date. Futures contracts go further, legally obligating both parties to complete the transaction at the agreed price and time. Warrants work similarly to options but are issued directly by the company, letting you purchase newly issued stock at a fixed price.
These instruments serve two main purposes: hedging risk and speculating on price movements. A farmer might sell wheat futures to lock in a price for next season’s harvest. A portfolio manager might buy put options to protect against a stock market decline. The contractual leverage built into derivatives means both gains and losses can be magnified well beyond the initial investment.
Regulatory jurisdiction over derivatives is split between two federal agencies. The SEC oversees options on individual securities and security-based swaps, meaning contracts tied to a single security, a narrow group of securities, or events affecting a specific issuer. The Commodity Futures Trading Commission handles futures, commodity options, and most other swaps. The Dodd-Frank Act formalized this division and brought many previously unregulated swap contracts under federal oversight for the first time.
Asset-Backed Securities
Asset-backed securities are created through securitization. A lender bundles income-producing debts such as home mortgages, car loans, or credit card balances and sells interests in the pool to investors. Cash flow from borrowers’ monthly payments passes through to the security holders. The process gives lenders fresh capital to make new loans while giving investors access to a diversified stream of payments they could not easily assemble on their own.
The legal architecture revolves around a special purpose vehicle, a separate legal entity created solely to hold the pooled assets. The SPV is designed to be bankruptcy-remote, so if the original lender goes under, its creditors cannot seize the assets sitting in the SPV.11National Bureau of Economic Research. Special Purpose Vehicles and Securitization That structural isolation is what makes asset-backed securities viable. Without it, investors would be exposed to the lender’s overall financial health rather than just the performance of the underlying loans.
Pools are typically sliced into tranches with different risk and return levels. Senior tranches get paid first and carry higher credit ratings. Junior tranches absorb the first losses when borrowers default. After the 2008 financial crisis exposed how badly the process could go wrong, federal regulators imposed a risk retention requirement: the entity that packages a securitization must generally keep at least 5% of the credit risk on its own books.12eCFR. Part 244 – Credit Risk Retention (Regulation RR) The skin-in-the-game rule aligns the securitizer’s incentives with those of investors. Certain qualifying pools backed by high-quality assets can get the retention requirement reduced or eliminated.
Securities That Skip Full SEC Registration
Not every security has to go through full SEC registration. Federal law exempts several categories outright, including securities issued or guaranteed by the U.S. government, state and local governments, and federally regulated banks.13Office of the Law Revision Counsel. 15 U.S. Code 77c – Classes of Securities Under This Subchapter Retirement plan securities and certain insurance contracts are also exempt. The carve-outs recognize that other regulatory frameworks already give investors adequate protection for those instruments.
For private companies raising capital, the most commonly used exemptions live under Regulation D. Rule 506(b) lets a company raise unlimited money from accredited investors plus up to 35 sophisticated non-accredited investors, but bans public advertising of the offering. Rule 506(c) permits public advertising, but every buyer must be accredited and the company must take reasonable steps to verify that status.14U.S. Securities and Exchange Commission. Rule 506 of Regulation D Securities sold under either rule are restricted, so the buyer cannot freely resell them.
Regulation A+ offers another path for companies that want to sell to the general public without full registration. Tier 1 offerings are capped at $20 million in a 12-month period, while Tier 2 offerings can reach $75 million.15U.S. Securities and Exchange Commission. Regulation A
Many exempt offerings are limited to accredited investors. You qualify if your net worth exceeds $1 million (excluding your primary residence), individually or with your spouse.16U.S. Securities and Exchange Commission. Accredited Investor Net Worth Standard Individual income of at least $200,000 in each of the prior two years ($300,000 jointly with a spouse), with a reasonable expectation of the same in the current year, also qualifies you. Holders of certain professional licenses, including the Series 7, Series 65, and Series 82, qualify regardless of income or net worth.17U.S. Securities and Exchange Commission. Accredited Investors
How Taxes Differ by Security Type
How a security gets taxed depends on both the type of instrument and how long you hold it. The most favorable treatment goes to long-term capital gains, which apply when you sell a security you have held for more than one year. For 2026, single filers with taxable income up to $49,450 pay 0% on long-term gains. The 15% rate applies between $49,450 and $545,500, and the 20% rate kicks in above that. For married couples filing jointly, the 0% threshold is $98,900, the 15% rate covers income up to $613,700, and the 20% rate applies above.18Internal Revenue Service. Revenue Procedure 2025-32 Short-term capital gains on securities held one year or less are taxed at your ordinary income rate, which can be as high as 37%.
Dividends split into two buckets. Qualified dividends, which include most dividends from domestic corporations and certain foreign companies, are taxed at the same favorable rates as long-term capital gains. Non-qualified dividends are taxed as ordinary income. Interest from corporate bonds is always taxed as ordinary income. Municipal bond interest is generally exempt from federal income tax, which is why municipal bonds remain popular with higher-income investors despite lower yields. High earners should also factor in the 3.8% net investment income tax, which applies to investment income above certain thresholds and effectively raises the top rate on capital gains and qualified dividends to 23.8%.