ETF Investing Guide: Index Funds & Bitcoin ETFs

What is an ETF?

An ETF is a fund that trades on a stock exchange like a single share. It may track an index (such as the S&P 500 or MSCI World), a sector, a commodity or, since 2024, the spot price of Bitcoin or Ether. You can buy and sell it throughout the trading day at the market price.

ETFs vs index mutual funds

	ETF	Index mutual fund
Trading	Intraday at market price	Once per day at closing NAV
Costs	Expense ratio + spread + any commission	Expense ratio, sometimes platform fees
Best for	Flexibility, trading and investing	Automatic regular investing

What to check before buying an ETF

Expense ratio (TER/OCF): broad index ETFs can cost under 0.1% a year.
Index and holdings: what it actually owns, and how concentrated it is.
Size and liquidity: larger funds usually have tighter spreads.
Tracking difference: how closely it has followed its index after costs.
Accumulating vs distributing: reinvest dividends automatically or pay them out.
Domicile and tax: UK and EU investors usually buy UCITS ETFs; US investors use US-listed funds.

Types of ETFs

Broad market (S&P 500, total market, world), sector (technology, energy, healthcare), bond, commodity (gold), thematic and crypto ETFs. Leveraged and inverse ETFs reset daily and can lose value over time even if the index ends flat. They are short-term trading tools, not long-term holdings.

Spot Bitcoin and Ethereum ETFs

Spot crypto ETFs hold the underlying coins and let you get exposure through a regular brokerage account, with no wallets or exchange accounts needed. The trade-offs: annual fees, trading only during market hours, and no ability to withdraw the coins. Availability depends on your country.

Core-satellite: combining investing and trading

Many traders keep a core of low-cost diversified ETFs for long-term growth and a smaller satellite account for active trades. If the satellite has a bad year, the core keeps compounding. It is a simple way to keep trading losses from derailing your long-term finances.

Trading with ETFs

Sector ETFs make it easy to trade market themes without single-stock risk. Comparing a sector ETF's trend against the S&P 500 (relative strength) shows where money is flowing. See technical analysis for the tools.

Frequently asked questions

Are ETFs good for beginners?

Broad, low-cost index ETFs are widely considered a sensible starting point for long-term investors because they offer instant diversification.

What is a good expense ratio?

For broad index ETFs, many charge well under 0.25% a year, and some under 0.1%. Specialist and thematic ETFs usually cost more.

Should I hold leveraged ETFs long term?

Generally no. Daily resets cause decay in volatile markets, so leveraged ETFs are designed for short-term trading.

Keep learning

Guide

ETFs and index funds: low-cost diversification