Learn · Hedge Fund Basics
The Different Types of Funds
Fund names become confusing because they answer different questions. Mutual fund, ETF, closed-end fund, interval fund, and UIT describe legal structures or the way shares are offered and traded. A CIT is a bank-administered trust. Hedge funds and other private funds rely on exemptions from the rules for registered investment companies. Index, active, target-date, money-market, equity, and bond describe a strategy or portfolio rather than a universal wrapper.
That is how an S&P 500 portfolio can appear as a mutual fund, an ETF, or a CIT inside a retirement plan. The stocks may look similar, but the investor does not receive the same product. Pricing, trading, disclosure, eligibility, taxes, and withdrawal rights all depend on the structure around the portfolio.
An index fund is a strategy label. A mutual fund is a legal product structure.
Start with the label
A vehicle label explains how someone buys, values, and exits the investment, as well as which disclosure and governance rules apply. A mutual fund order receives the next calculated NAV. ETF and listed closed-end shares are bought and sold on an exchange, although closed-end funds usually do not buy shares back each day. Interval-fund investors use scheduled repurchase windows. CITs are usually offered through eligible retirement plans, not retail brokerage accounts.
A strategy label explains what the portfolio is designed to do. It may track an index, select securities actively, hold bonds, follow a target-date glide path, or invest in private markets. For a private fund, the legal exemptions used by the fund and its offering also affect who is allowed to invest.
What is an index fund?
An index fund seeks to follow a stated market index before fees and expenses. Some hold every security in the index. Others use a representative sample or derivatives. The prospectus, trust materials, or plan disclosure should explain the method and the benchmark.
Passive management still involves choices. An index provider writes the methodology, while the fund manager handles cash flows and trading. Fees, transaction costs, taxes, and tracking error can pull the result away from the benchmark. A narrow sector index can also be much more concentrated than a broad-market index.
An index fund can be low cost and diversified, yet it can still fall sharply when the market it tracks falls.
Lower turnover often reduces trading costs and may reduce taxable capital-gain distributions. Neither outcome is guaranteed. Check the fund's expense ratio and turnover, the trading spread if it is an ETF, and the tax treatment of the investor's own account.
What is a mutual fund?
A mutual fund is an SEC-registered open-end investment company. Investors buy shares from the fund, often through an intermediary, and sell shares back to it. Both transactions use the NAV calculated after the order arrives. The portfolio can follow an index or give an adviser discretion to select investments within the stated mandate.
Registration brings standardized disclosure and rules covering areas such as custody, valuation, liquidity, leverage, and conflicts. It does not remove investment risk. Costs may include the expense ratio, sales charges, account fees, and trading inside the portfolio. Active turnover can also create taxable distributions in a U.S. taxable account, while a retirement account may have a different after-tax result.
What is an exchange-traded fund (ETF)?
An ETF is a pooled product whose shares trade on a national securities exchange. Registered ETFs are organized as open-end investment companies or, in some cases, UITs. Retail investors trade them through brokerage accounts at market prices, which can sit above or below the portfolio's NAV.
Some ETFs track indexes and others are actively managed. The expense ratio, bid-ask spread, brokerage charges, trading volume, and premium or discount to NAV all affect what the investor pays or receives. Leveraged and inverse ETFs need extra scrutiny because their daily reset can make longer-term returns differ sharply from the benchmark's move over the same period.
ETF tells the reader where shares trade; index and active describe how the portfolio is managed.
ETF is narrower than exchange-traded product. An exchange-traded note is unsecured debt issued by a financial institution. A commodity trust may sit outside the Investment Company Act. A ticker symbol and intraday trading do not turn either one into a registered ETF.
What is a collective investment trust (CIT)?
A CIT, also called a collective investment fund or collective trust, pools eligible fiduciary accounts in a trust administered by a bank. The bank serves as trustee and holds legal title to the assets. The portfolio itself may use an index, active, bond, target-date, or other strategy.
CITs commonly appear in employer retirement plans. A participant usually reaches one through the plan menu rather than a retail brokerage account. When the relevant exclusions apply, a CIT does not use the same registration and retail-prospectus framework as a mutual fund. Investors therefore need the trust declaration, participation materials, fact sheet, and plan disclosures to learn the actual rules.
Most individual investors encounter a CIT through an employer retirement plan, not a retail brokerage account.
Ask who serves as trustee and investment manager, when units are valued, and how contributions and withdrawals are processed. Check whether the trust can use derivatives or securities lending and what the plan pays after every fee. A shared benchmark does not mean the CIT has the same terms as a mutual fund or ETF.
What about closed-end funds, interval funds, and UITs?
A listed closed-end fund usually raises a fixed pool of capital and its shares then trade on an exchange. Supply and demand can push the share price above NAV, called a premium, or below NAV, called a discount. Check the size of that discount or premium, the use of leverage, the source of distributions, and the liquidity of the holdings.
An interval fund is a closed-end fund that does not trade like a listed closed-end fund. It offers to buy back a limited percentage of its shares on scheduled dates, usually at NAV. If investors ask to sell more than the offer allows, each request may be reduced. This structure can hold less liquid investments, so the valuation process and repurchase limits deserve close attention.
A UIT normally sells a fixed number of units, holds a relatively fixed portfolio, and ends on a date set when the trust is created. Some ETFs are organized as UITs, so UIT and ETF are not mutually exclusive labels. A business development company is a specialized closed-end investment company. Its leverage, fees, portfolio holdings, and trading structure need to be reviewed separately.
Money-market, bond, equity, balanced, and target-date describe what a fund owns or is trying to do, so each can appear in more than one legal vehicle. Private-equity, venture-capital, real-estate, and private-credit funds are usually private funds, but their capital calls, valuation methods, distributions, and holding periods often differ from hedge funds. A separately managed account is not a fund: one client owns the assets in the account directly.
What is a hedge fund?
A hedge fund is a privately offered pooled investment, but the label does not identify one strategy. One fund may own stocks for years. Another may trade frequently, sell securities short, use derivatives, borrow to increase exposure, or hold assets that are hard to sell. The word hedge does not promise low market exposure or limited losses.
Private funds still operate under securities law. Their advisers may register with the SEC or a state regulator, or they may rely on an exemption. Separate rules govern the fund's ownership, how interests may be offered, and who is eligible to invest. The offering documents identify which rules apply to that fund. Who Can Invest in a Hedge Fund? walks through those tests.
Investor liquidity can differ from portfolio liquidity. A fund may own securities that trade each day while allowing investors to withdraw only monthly, quarterly, or less often. The offering documents may also require advance notice, impose a lockup, limit withdrawals through a gate, or suspend them. Review those restrictions together with fees, borrowing costs, valuation methods, and the roles of the administrator, auditor, custodian, prime broker, and counsel.
A hedge fund has more flexibility than a registered fund, but that flexibility can increase leverage, liquidity, valuation, concentration, and conflict risks.
What should an investor compare across funds?
The explorer below compares two structures at a time. It opens with an ETF and a CIT because both may track the same index, yet one is traded in a brokerage account and the other is usually accessed through a retirement plan. Choose any two of the eight structures to compare pricing, access, withdrawal rules, risks, and governing documents.
Choose a suggested pair or pick any two structures. Each card separates portfolio strategy from access, pricing, and withdrawal rules.
These are general educational illustrations, not an offer or any fund's actual terms. They do not predict or project performance. Read the governing documents for the actual terms.
1. What does the label describe? Identify the vehicle, the strategy, and the assets actually held.
2. What can cause a loss? Look for market exposure, concentration, leverage, short positions, derivatives, counterparties, and the possibility that the manager or index methodology is wrong.
3. What is the total cost? Include stated fees, turnover, commissions, spreads, market impact, borrowing costs, and investor-specific tax effects.
4. How can money be withdrawn? Compare exchange trading or daily redemption with periodic repurchases, plan rules, private-fund windows, notice periods, lockups, gates, and suspension rights.
5. Who provides oversight? Review registration, governance, valuation, conflicts, and the roles of trustees, administrators, auditors, custodians, prime brokers, and legal counsel when they are relevant.
The fund's governing documents define its fees, eligibility rules, and withdrawal terms.
Frequently asked questions
How can an index fund be a mutual fund, ETF, or CIT?
Index describes the strategy of tracking a benchmark. Mutual fund, ETF, and CIT describe different vehicles that can hold an index-tracking portfolio. Access, pricing, disclosure, and withdrawal rules can differ even when the benchmark is the same.
Is every ETF an index fund?
No. Many ETFs track indexes, while others use active strategies. Registered ETFs should also be distinguished from commodity trusts and exchange-traded notes.
What is a CIT, and can an individual buy one?
A CIT is a bank-administered pooled trust for eligible fiduciary accounts. Individuals commonly gain exposure through an employer retirement plan or another eligible arrangement rather than buying units directly in a retail brokerage account.
Does a hedge fund always hedge market risk?
No. Some hedge funds reduce broad market exposure, while others remain net long, use leverage, concentrate positions, or take risks that come from different sources.
Why are hedge funds usually limited to certain investors?
Private funds and their offerings rely on exemptions that can limit ownership, solicitation, and investor eligibility. The offering documents identify the requirements for a particular fund.