An investor is a person, company, or institution that commits money to an asset, business, or project with the expectation of earning income, achieving capital growth, or both, over time. Investors range enormously in scale and sophistication, from an individual contributing a small amount to a retirement account each month, to large institutional investors such as pension funds, insurance companies, and sovereign wealth funds managing billions in assets on behalf of their own beneficiaries or stakeholders.
Investors are generally categorized by regulators and the financial industry into retail investors, ordinary individuals investing their own personal money, and institutional investors, organizations investing large pools of capital on behalf of others, with different regulatory protections and access to certain investment products often applying differently to each category.
Investor in plain terms
An investor is simply anyone putting money at some risk today in exchange for the prospect of a financial benefit later, whether that is a person buying a few shares through an investment platform, a venture capital firm funding a startup, or a pension fund buying government bonds on behalf of millions of future retirees. What unites all investors is the decision to commit capital now based on an expectation about the future, rather than simply holding that capital in cash.
Types of investors
- Retail investors, individuals investing their own personal savings, typically through brokerage accounts, retirement plans, or investment platforms.
- Institutional investors, organizations such as pension funds, insurance companies, mutual funds, and endowments, managing large pools of capital on behalf of others.
- Accredited or sophisticated investors, a legally defined category in several jurisdictions permitted to access certain higher-risk or less-regulated investment products not generally available to the broader public.
- Angel investors and venture capitalists, who specifically invest in early-stage private companies in exchange for an ownership stake and the prospect of substantial future growth.
Investor protections
Securities regulators generally impose stricter disclosure and suitability requirements on investments marketed to ordinary retail investors than on those marketed exclusively to institutional or accredited investors, on the theory that sophisticated, well-resourced institutions are better equipped to evaluate complex or higher-risk investments on their own than an individual retail investor typically is.
Investor time horizon and goals
An investor's appropriate strategy depends heavily on their specific time horizon and financial goals, since a retirement saver with decades until needing the funds can generally tolerate more short-term volatility in pursuit of higher long-term returns than someone investing money they expect to need within the next year or two, a distinction that underlies most professional guidance on asset allocation and portfolio construction.
Behavioral finance research has shown that even professional investors are prone to predictable psychological biases, such as overconfidence and loss aversion, which is one reason many institutional investors build systematic, rules-based processes specifically designed to counteract these tendencies rather than relying purely on individual judgment call by call.
Regulators distinguish investors partly to calibrate disclosure requirements, assuming an institutional investor's own professional staff can evaluate a complex investment's risks without the same level of simplified, standardized disclosure a retail investor would need to make an informed decision.
An investor's chosen asset allocation, how money is split across different asset classes, is widely considered a more significant driver of long-term returns than which specific individual securities are selected within each asset class.
Government pension and sovereign wealth funds, among the largest institutional investors globally, often publish their own investment principles and voting policies publicly, giving smaller retail investors a window into how the largest pools of capital in the world approach risk and portfolio construction.
Crowdfunding platforms have more recently extended limited investment access to ordinary retail investors in private companies, a category traditionally reserved for accredited investors, though usually with lower individual investment limits reflecting the regulator's continued caution around this higher-risk category of investing.
Index investing has grown so large in recent decades that index funds now collectively hold a significant share of many major public companies, a shift that has itself raised new questions among regulators about how concentrated voting power among a small number of giant fund managers affects corporate governance broadly.
A broker or adviser working with a retail investor is generally held to stricter disclosure obligations than one serving only institutional clients.
A portfolio's overall risk depends heavily on how its individual holdings interact, not simply on how many different investors hold a stake in it.