How to Invest in the Nasdaq (UK Guide)

Last reviewed: July 2026

What "the Nasdaq" means

The term Nasdaq is used loosely to mean several different things, which causes confusion. Nasdaq is a US stock exchange, one of the largest in the world by listed company value. The Nasdaq Composite is a broad index of nearly every company listed on that exchange, several thousand in total. The Nasdaq-100 is a narrower index of the 100 largest non-financial companies listed on Nasdaq, ranked by market capitalisation. When investment platforms and funds refer to "investing in the Nasdaq," they are almost always referring to the Nasdaq-100, since that is the index most ETFs and index funds are built to track.

Like other indices, the Nasdaq-100 is a calculation, not a security. UK investors cannot buy it directly. They gain exposure through a fund built to replicate its performance.

Why the Nasdaq-100 is different from the S&P 500

Both indices track large US companies, and there is significant overlap in constituents, since many of the largest S&P 500 companies are also in the Nasdaq-100. The key difference is sector concentration. The Nasdaq-100 excludes financial companies entirely and has historically carried a much heavier weighting toward technology, software, and communication services than the broader, more sector-diversified S&P 500.

This concentration has cut both ways historically. During periods of strong technology sector performance, the Nasdaq-100 has often outpaced the S&P 500. During periods when technology stocks have fallen out of favour, it has typically fallen further than the broader market. Investors considering Nasdaq-100 exposure are, in practice, making a more concentrated sector bet than investors in a broad market index, even though the fund itself holds 100 companies.

The five-step process to invest

Step one is choosing an account type. A Stocks and Shares ISA shelters gains and income from UK tax within the annual allowance. A SIPP adds tax relief on contributions but locks access until minimum pension age. A general investment account carries no contribution limit but no tax shelter beyond the standard annual allowances.

Step two is opening an account with an FCA-regulated investment platform, which requires identity verification under UK anti-money laundering rules.

Step three is depositing funds, either as a lump sum or through automated regular contributions.

Step four is selecting a fund. Several providers offer UCITS-compliant Nasdaq-100 tracker ETFs listed on European exchanges, structured to be accessible to UK and European retail investors without needing a US brokerage account.

Step five is placing the trade. ETFs trade throughout the day at a live market price. Index funds are priced once daily.

Currency risk

Nasdaq-100 constituent companies report earnings in US dollars, and the underlying shares trade in dollars even when the UCITS ETF wrapper is listed and traded in pounds on a UK exchange. This means UK investors carry GBP/USD exchange rate exposure on top of the underlying share price risk. A strengthening pound reduces sterling returns when the investment is converted back; a weakening pound increases them. Currency-hedged share classes exist for some Nasdaq-100 ETFs, which use forward contracts to reduce this exposure at an additional ongoing cost, typically an extra 0.10 to 0.20 percent per year above the unhedged version.

Costs to check

Ongoing charges for Nasdaq-100 tracker funds are generally low relative to actively managed funds but can run higher than a broad market S&P 500 or global tracker, reflecting the narrower, more specialist nature of the index. The Ongoing Charges Figure is disclosed by every UK-regulated fund and should be checked before comparing options, alongside whether a currency-hedged version is being considered, since hedging adds to the annual cost.

Tax treatment

Inside a Stocks and Shares ISA, gains and income from Nasdaq-100 funds are free of UK tax. Inside a SIPP, contributions attract tax relief and growth is untaxed until withdrawal, with withdrawals taxed as income above the tax-free lump sum. Outside a tax wrapper, gains above the £3,000 Capital Gains Tax allowance for 2026/27 and dividend income above the £500 dividend allowance are taxable, with both allowances set by HM Revenue and Customs.

Concentration risk in more detail

Because the Nasdaq-100 is market-capitalisation weighted, the very largest constituents can represent a substantial share of the index's total value. This means the index's overall performance can be strongly influenced by the fortunes of a small number of mega-cap technology companies, rather than reflecting the average performance of all 100 constituents equally. Investors should understand this concentration before treating a Nasdaq-100 fund as a fully diversified core holding, since it behaves more like a concentrated sector and mega-cap bet than a broad market index.

How the Nasdaq-100 is rebalanced

Nasdaq, Inc. reviews the index composition annually, with the ranking of eligible companies reassessed each December and changes taking effect the following week. Alongside the annual review, the index also uses quarterly weight adjustments to prevent any single constituent or small group of constituents from growing to dominate the index beyond specific concentration limits set out in the index methodology. This periodic rebalancing means the exact company weightings within a Nasdaq-100 tracker fund shift over time even though the fund itself is passively managed and not making active stock-picking decisions.

When a company is removed from the Nasdaq-100, either for falling in ranking or for no longer meeting the exchange listing requirements, tracker funds must sell that holding and buy the replacement to keep matching the index. This process happens automatically within the fund and does not require any action from the investor.

Physical versus synthetic replication

Nasdaq-100 tracker funds generally use one of two replication methods. Physical replication means the fund directly holds the underlying shares of the index constituents, in proportions matching the index weightings. Synthetic replication means the fund uses a derivative contract, typically a swap with a counterparty bank, to deliver the index return without directly holding every underlying share. Both approaches aim for the same outcome, tracking the index as closely as possible, but they carry different types of risk: physical replication carries stock lending and custody considerations, while synthetic replication introduces counterparty risk, the risk that the swap counterparty could fail to meet its obligations. UK-regulated UCITS funds using synthetic replication are required to limit and collateralise this counterparty exposure under UCITS rules.

How the Nasdaq-100 compares with a global tracker

A global equity tracker fund typically spreads investment across many countries and sectors, including the US, Europe, Japan, and emerging markets, with technology as one sector among several. A Nasdaq-100 tracker, by contrast, is concentrated in one country and skewed toward a small number of sectors. Holding both is not necessarily redundant, since a global tracker's US allocation may itself be weighted differently than the Nasdaq-100, but investors should be aware of how much overlap exists between a Nasdaq-100 holding and any other US or global funds already held, to avoid unintentionally concentrating a portfolio more heavily in technology than intended.

ETF structure versus index fund structure

A Nasdaq-100 ETF trades on a stock exchange throughout the trading day, meaning its price moves continuously and an order can be placed and executed within seconds at whatever price the market is offering at that moment, subject to normal exchange trading hours. An index fund structured as a unit trust or OEIC, by contrast, is priced once per day at a specific valuation point, and any buy or sell order placed is executed at that day's single price rather than a live market price. For long-term investors who are not trying to time entry or exit within a single day, this distinction matters less than the ongoing charge and tracking accuracy of the fund, but it is worth understanding before choosing between the two structures, since the trading mechanics and, in some cases, the minimum investment amounts differ between them.

Frequently asked questions

Is "the Nasdaq" the same as the Nasdaq-100?

Usually, yes, in the context of investment funds. Nasdaq is the exchange itself, and the Nasdaq Composite tracks nearly every company listed there. Most funds marketed as Nasdaq trackers follow the narrower Nasdaq-100 index instead.

Can UK investors buy the Nasdaq-100 directly?

No. It is an index, not a security. UK investors access it through a UCITS-compliant ETF or index fund built to replicate its performance.

Does the Nasdaq-100 include financial companies?

No. Financial companies are excluded from the Nasdaq-100 by the index's own rules.

What currency risk applies to Nasdaq-100 investments from the UK?

Nasdaq-100 constituents are priced in US dollars, so UK investors carry GBP/USD exchange rate exposure alongside the underlying share price risk, unless a currency-hedged fund share class is used.

What account can hold a Nasdaq-100 fund in the UK?

A Stocks and Shares ISA, a Self-Invested Personal Pension, or a general investment account can all hold Nasdaq-100 ETFs and index funds.

Is the Nasdaq-100 more volatile than the S&P 500?

Historically it has shown greater sensitivity to swings in technology sector sentiment than the more sector-diversified S&P 500, though past volatility is not a guarantee of future behaviour.

Do I need a US brokerage account to invest in the Nasdaq-100 from the UK?

No. UCITS-compliant Nasdaq-100 ETFs are listed on European exchanges and can be bought through a standard UK investment platform, without needing a separate US brokerage account or dealing directly in US-listed securities.