S&P 500 Index: Chart | Quote | Open Times

The S&P 500 Index is one of the world’s most important share market benchmarks, tracking 500 leading large-cap companies listed in the United States.

It is widely used as a gauge of US equities because it covers about 80% of available US market cap, giving investors broad exposure to America’s corporate sector in a single index. For Australian investors, the S&P 500 is often used as a core international holding because it provides access to sectors that are underrepresented on the ASX, especially technology, healthcare, communication services and global consumer brands.

S&P 500 Index Chart

The Structure

The S&P 500 is a market capitalisation-weighted index, meaning larger companies have a bigger influence on performance than smaller companies. This makes it a better reflection of the US large-cap market than a simple equal-weighted average, but it also means the index can become concentrated when a handful of mega-cap companies dominate.

The index spans all major sectors of the US economy, including technology, healthcare, financials, consumer discretionary, industrials, energy, utilities and consumer staples.

To qualify for inclusion in the S&P 500, companies must meet specific criteria including market capitalization requirements, liquidity standards, and financial viability measures. The index committee regularly reviews these holdings, adding and removing companies as market conditions change.

Unlike the Nasdaq 100, which excludes financial companies and leans heavily toward technology, the S&P 500 captures a wider mix of the US economy. Despite this, it is still heavily influenced by large technology and communication services companies, so it is not as evenly diversified as the number “500” may suggest. Investment in the S&P 500 provides exposure to global software, cloud, artificial intelligence, healthcare and consumer-platform businesses that are limited on the ASX 200.

Leading Companies in the S&P 500

The S&P 500 includes many of the world’s most recognizable and valuable companies. These companies are important not just because of their size, but because many earn revenue globally, meaning the S&P 500 is more than a simple bet on the US domestic economy. We have added a few of the major financial names into the mix above, particularly as those are not included in the Nasdaq 100. It’s also worth remembering that the largest holdings in the index can have a major impact on returns, so the S&P 500 is diversified, but not equally balanced.

Technology Giants

• Apple Inc. – Consumer electronics and software services
• Microsoft Corporation – Software, cloud computing, and productivity tools
• Amazon Inc. – E-commerce and cloud infrastructure services
• Alphabet Inc. – Search engines and digital advertising platforms
• Meta Platforms Inc. – Social media and virtual reality technologies
• NVIDIA Corporation – Graphics processing and artificial intelligence chips

Other Major Holdings

• Tesla Inc. – Electric vehicles and energy storage systems
• Berkshire Hathaway Inc. – Diversified investment conglomerate
• Johnson & Johnson – Pharmaceuticals and consumer healthcare products
• JPMorgan Chase & Co. – Banking and financial services

S&P 500 ETFs Available in Australia

Australian investors can gain exposure to the S&P 500 through various Exchange Traded Funds (ETFs) listed right here on the ASX. These funds offer convenient access to US Stocks exposure without the complexity of direct international trading.

The iShares S&P 500 ETF (ASX: IVV) aims to provide the performance of the S&P 500 Index before fees and expenses. The iShares S&P 500 AUD Hedged ETF (ASX: IHVV) provides hedged exposure to a version of the S&P 500 designed to reduce AUD/USD currency impact. The SPDR S&P 500 ETF Trust (ASX: SPY) is available on the ASX as CHESS Depositary Interests over the US-listed SPY trust. Whilst it is popular, note that Vanguard US Total Market Shares Index ETF (ASX: VTS) is not a direct S&P 500 tracker, but one which tracks the broader CRSP US Total Market Index.

Vanguard S&P 500 Index ETF (VTS)

• Tracks the S&P 500 index directly
• Low management fees
• Unhedged exposure to U.S. dollar fluctuations

iShares Core S&P 500 ETF (IVV)

• Comprehensive S&P 500 exposure
• Competitive expense ratios
• High liquidity for easy trading

SPDR S&P 500 ETF Trust (SPY)

• One of the oldest and most liquid S&P 500 ETFs
• Available through international trading platforms
• High trading volumes ensure tight bid-ask spreads.

S&P 500 Trading Hours in Australian Eastern Standard Time

US share markets trade during regular hours from 9:30am to 4:00pm US Eastern Time, with Nasdaq pre-market trading from 4:00am to 9:30am ET and after-hours trading from 4:00pm to 8:00pm ET. For Australians, the main US session usually runs from about 11:30pm to 6:00am AEST during the US daylight saving period, and around 1:30am to 8:00am AEDT when the US is on standard time and eastern Australia is on daylight saving time.

ASX-listed S&P 500 ETFs trade during ASX hours, with normal trading from about 9:59:45am to 4:00pm Sydney time, making them more convenient for local investors.

Regular Trading Hours (AEST)

• Opening Time: 12:30 AM AEST (Monday to Friday)
• Closing Time: 7:00 AM AEST (Monday to Friday)
• Total Duration: 6.5 hours of continuous trading

Extended Trading Sessions

• Pre-market Trading: 10:00 PM AEST to 12:30 AM AEST
• After-hours Trading: 7:00 AM AEST to 10:00 AM AEST

Important Considerations for Australian Traders

• U.S. markets operate during Australian nighttime hours
• Daylight saving time differences can shift these hours by one hour
• Major economic announcements often occur during U.S. trading hours
• Australian ETFs tracking the S&P 500 trade during standard ASX hours (10:00 AM to 4:00 PM AEST)

S&P 500 vs Other Indices

Vs Nasdaq 100

The S&P 500 is broader than the Nasdaq 100 because it includes financials, industrials, energy, utilities, healthcare and consumer staples, while the Nasdaq 100 is more concentrated in technology and growth companies. The Nasdaq 100 may outperform strongly when mega-cap tech and AI-related stocks are leading the market, but the S&P 500 can offer smoother sector diversification. For many Australian investors, the S&P 500 is better suited as a core US equity exposure, while the Nasdaq 100 is more of a concentrated growth allocation.

vs Dow Jones Industrial Average

The Dow Jones Industrial Average tracks only 30 large US companies and is price-weighted, meaning higher-priced shares have more influence regardless of company size. The S&P 500, by contrast, covers 500 companies and is weighted by market capitalisation, making it a more representative measure of US large-cap equities. Investors may still hear the Dow quoted in financial media, but the S&P 500 is generally more useful for portfolio benchmarking.

vs ASX 200

The S&P 500 and ASX 200 offer very different exposures. The ASX 200 is heavily influenced by Australian banks, miners, iron ore, energy and dividends, while the S&P 500 provides much deeper exposure to global technology, healthcare, software, consumer brands and US-listed multinationals.

S&P 500 Sector Allocation:

• Technology: Approximately 25-30%
• Healthcare: 12-15%
• Financials: 10-13%
• Consumer Discretionary: 10-12%

ASX 200 Sector Allocation:

• Financials: 25-30%
• Materials: 15-20%
• Healthcare: 8-12%
• Technology: 3-6%

Conclusion

The biggest benefit of the S&P 500 is simple access to many of the world’s most profitable and innovative companies. Through a single ETF, Australian investors can gain exposure to US technology leaders, healthcare giants, financial institutions, industrial companies and consumer brands. The index is also highly liquid, widely followed and supported by a large range of low-cost ETF products, making it one of the easiest international markets to access.

It can work well as a core international equity holding, especially for investors looking to diversify beyond the ASX’s heavy concentration in banks and resources. However, it remains important to understand the differences between hedged and unhedged ETFs, the impact of US market hours, and the concentration of returns among the largest companies. Rising US bond yields, recession fears, weaker earnings or regulatory pressure on large technology companies can also affect performance.