Collection ETF & Foreign Stocks 2026.07.14

Essential Terms to Know When Starting with ETFs

An overview of key concepts like Exchange-Traded Funds, underlying indices, NAV, premium/discount, tracking error, and fees that you should understand before investing in ETFs.

ETFs are funds that can be bought and sold like stocks, making them very accessible. However, if you buy without knowing their structure, you might encounter unexpected results. It's important to understand what index an ETF follows, why the market price might differ from its net asset value (NAV), and how fees and tracking errors can impact your long-term returns. Especially, leveraged, inverse, international, and commodity-type ETFs can have more complex structures than standard index ETFs. This list summarizes essential terms that are good to know when studying ETFs for the first time.

ETF

ETF stands for Exchange-Traded Fund, and it's easy to understand when you think of it as a product that combines the advantages of index funds and stock trading. The Ministry of Economy and Finance's Economic Glossary defines an ETF as a product that allows investors to trade index funds listed on an exchange as conveniently as stocks. By purchasing one share of an ETF, you effectively gain diversified exposure to multiple underlying assets. However, since each ETF has different indices, management methods, and risk levels, you should not assume that "ETFs are safe".

유형 기본 개념 핵심 포인트 상장지수펀드, 주식처럼 거래, 펀드 구조 확인 팁 ETF 이름보다 추종 지수와 구성자산 먼저 확인

바로가기

Underlying Index

The underlying index is a key criterion that determines the direction of an ETF. The returns and risks can vary entirely depending on which index an ETF tracks. For example, the KOSPI 200 ETF closely follows large domestic stocks, the NASDAQ 100 ETF has a high composition of U.S. tech stocks, and bond ETFs are sensitive to interest rate changes. Thematic ETFs may focus on a specific industry or keyword, which can limit diversification. When looking at ETFs, it's more important to verify the actual composition and criteria of the underlying index rather than get caught up in the theme indicated by the name.

유형 상품 기준 핵심 포인트 추종 지수, 구성 방법, 편입 종목, 리밸런싱 확인 팁 ETF 이름과 실제 기초지수가 일치하는지 보기

바로가기

NAV and Market Price

ETFs are funds that trade in real-time on exchanges. NAV refers to the net asset value of the assets held by the ETF, while the market price is the price at which investors actually buy and sell. The market price can differ from NAV due to market conditions, liquidity, and time differences in foreign markets. If this difference widens, there is a risk of buying at a high price or selling at a low price. When purchasing an ETF, it's important not to look only at the current price but also to check the iNAV, premium/discount, and bid-ask spreads for more cautious trading.

유형 가격 개념 핵심 포인트 순자산가치, 시장가격, iNAV, 시간 차이 확인 팁 시장가격이 실제 가치와 얼마나 다른지 확인

바로가기

Premium/Discount

Premium/discount is a risk indicator that you must know in ETF investing. It shows the percentage difference between the market price and NAV when the market price is either higher or lower. The reason for a widening premium/discount can vary, such as when the underlying asset market is closed, there's insufficient trading volume, or quotes widen during periods of volatility. The KRX Academy explains that premium/discount is an important concept in the context of ETFs and ETNs. Particularly, overseas, commodity, and leveraged products can have significantly widened premiums/discounts, so it’s essential to check the closing premium/discount and real-time quotes before purchasing.

유형 위험 지표 핵심 포인트 시장가격과 NAV 차이, 고평가·저평가, 유동성 확인 팁 괴리율이 큰 상품은 추격 매수에 주의

바로가기

Tracking Error

Tracking error refers to the difference between the desired return of the underlying index and the actual return of the ETF. Although ETFs are managed to follow an index, they may not move identically due to fees, trading costs, dividend handling, cash holdings, currency changes, taxes, and replication methods. A smaller tracking error indicates stable tracking ability of the index, but some differences can occur depending on the product type. Over long-term investments, even small tracking errors can accumulate, making it an important criterion for comparing ETFs tracking the same index.

유형 운용 품질 지표 핵심 포인트 기초지수 수익률과 실제 ETF 수익률 차이 확인 팁 같은 지수 ETF끼리 추적오차와 보수 비교

바로가기

Total Fees and Costs

ETFs are generally known for having lower costs compared to regular funds, but total fees and other costs can vary among products. The National Investors Education Council describes low costs as one of the advantages of ETFs. However, it’s important not to look solely at the total fee figure but also consider actual total costs, trading spreads, currency exchange fees, and taxes. When comparing ETFs that track the same index, those with lower costs and active trading may be better for long-term investment. Keep in mind, however, that low costs do not automatically mean a good product, and you should also consider management stability and tracking error.

유형 비용 지표 핵심 포인트 총보수, 기타비용, 스프레드, 세금, 환전비용 확인 팁 장기 투자일수록 비용 차이를 더 중요하게 보기

바로가기

Distribution Income

Distributions

Distributions refer to cash flows you can receive while holding an ETF. Equity ETFs may generate distributions based on the dividends of their holdings, while bond ETFs may do so based on interest. However, not all ETFs distribute cash frequently, and the payment frequency and amount can vary depending on the product. Just because a distribution looks high does not necessarily mean it's a good product. Factors such as a decline in underlying asset prices or temporary issues can make the distribution yield appear inflated. When evaluating dividend ETFs, it’s important to check not just the distributions but also the total return, underlying assets, taxes, and payment stability.

유형 현금흐름 핵심 포인트 배당, 이자, 지급 주기, 분배율 확인 팁 분배금만 보지 말고 총수익률과 구성자산 확인

바로가기

LP and Liquidity

Since ETFs are traded on exchanges like stocks, liquidity is crucial. LP (liquidity providers) quote buy and sell prices within certain ranges to facilitate trading for investors. However, trades may not execute at the desired price at all times, especially during high volatility or if the underlying asset market is closed, causing quote spreads to widen. When purchasing an ETF, it’s advisable to check trading volumes, order book depth, spreads, and premium/discount together. Particularly for smaller ETFs, transaction costs may outweigh benefits in long-term holding.

유형 거래 구조 핵심 포인트 유동성공급자, 거래량, 호가 스프레드, 매매 편의성 확인 팁 시장가 주문보다 지정가 주문 활용

바로가기

ETFs are convenient products, but you shouldn't make purchases based solely on their names. Even among ETFs related to the KOSPI, NASDAQ, dividends, and bonds, the underlying indices, fees, currency hedges, income distributions, management methods, and trading volumes can all differ. Initially, it's crucial to build the habit of checking product structure and risks before chasing yield rankings. This list presents fundamental terms for understanding ETFs, and before making actual purchases, you should review information from the Korea Exchange, the fund manager's prospectus, and your investment horizon and risk tolerance.

한눈에 보기 8개

ETF

기본 개념 · 상장지수펀드, 주식처럼 거래, 펀드 구조 · ETF 이름보다 추종 지수와 구성자산 먼저 확인

Underlying Index

상품 기준 · 추종 지수, 구성 방법, 편입 종목, 리밸런싱 · ETF 이름과 실제 기초지수가 일치하는지 보기

NAV and Market Price

가격 개념 · 순자산가치, 시장가격, iNAV, 시간 차이 · 시장가격이 실제 가치와 얼마나 다른지 확인

Premium/Discount

위험 지표 · 시장가격과 NAV 차이, 고평가·저평가, 유동성 · 괴리율이 큰 상품은 추격 매수에 주의

Tracking Error

운용 품질 지표 · 기초지수 수익률과 실제 ETF 수익률 차이 · 같은 지수 ETF끼리 추적오차와 보수 비교

Total Fees and Costs