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What Moves Index Prices?

Index prices are determined by the price changes of their components. This means there’s a strong correlation between the index’s performance and the prices of the main constituent stocks. Some of the factors capable of moving index prices include:

  • Overall Market Sentiment: The structure of indices allows them to serve as stock market benchmarks. Because they are composed of multiple stocks, they tend to reflect the overall sentiment in the market. So, for instance, if the market is generally bullish, an underlying index will tend to see its prices rise. Some of the factors that can influence market sentiment include: Economic factors such as wages and inflation, Company news reports, Central bank announcements and Interest rates

  • Company News: News about companies with significant weighting within an index can influence its overall price direction. Some of the most impactful company news include: Earnings reports, Profit forecasts and warnings, Mergers and acquisitions and Changes in management.

  • Index Rebalancing: Most indices are rebalanced periodically. This rebalancing can see new companies included in the index while others are dropped. This rebalancing may also include an increase or decrease in the weightings of certain components within the index. The period from pre-announcement to effective rebalancing date and post-rebalancing period can be very volatile for prices of indices depending on the expected events.

  • Sector Performance: The performance of a sector can influence the overall performance of an index. For instance, Technology has a sector weight of about 27% on the S&P 500. If the sector faces tough economic conditions and tech stock prices decline sharply, this will also trigger price losses on the S&P 500.

  • Commodity Prices: Commodities support many economic activities of various companies. Many indices include the stocks of commodity companies. For instance, the UK FTSE 100 has about 13% of its weight in energy. Therefore, changes in the commodity market can have an influence on the overall price of the index.

  • Political Events: As broad benchmarks, indices are vulnerable to major political events such as elections, trade wars, or cross-country conflicts. For instance, the UK Brexit event triggered volatility in the UK indices market.

SP500 Trading App Ranking Methodology

We have rigorously evaluated numerous trading apps to present you with the best options for SP500 trading. Our ranking methodology is based on several key factors to ensure you have access to top-notch tools for trading on the U.S. stock market.

  1. User Interface and Ease of Use: Apps that offer a user-friendly interface and easy navigation score higher in our ranking.

  2. Trading Tools and Features: Apps providing advanced trading tools, technical analysis features, and real-time data are favored.

  3. Security and Reliability: We prioritize apps with robust security measures and a track record of reliability.

  4. Costs and Fees: Apps with transparent, competitive pricing and low fees are preferred.

  5. Customer Support: High-quality, responsive customer support is essential for a top-ranking.

  6. Regulatory Compliance: Only apps regulated by reputable bodies like the SEC and FINRA are considered.

  7. User Reviews and Ratings: Positive feedback and high ratings from current users add to the app's credibility.

  8. Mobile Trading Experience: Apps offering a seamless mobile trading experience are highly valued.


CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 76% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.

AvaTrade, a globally recognized broker, stands out in index trading for several key reasons:

  • Competitive Spreads: Offering some of the most competitive spreads in the industry, AvaTrade ensures cost-effective trading.

  • Advanced Trading Platforms: Access to user-friendly platforms like MetaTrader 4 and AvaTradeGo, suited for both beginners and experienced traders.

  • Diverse Trading Instruments: A broad range of instruments available for trading alongside the S&P500 index.

  • Regulation and Security: Strict adherence to regulatory standards and robust security measures to protect traders' interests.





Best-in-Class Apps for SP500 Index Trading




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Indices are financial instruments designed to track the overall price performance of a basket of stocks. An index uses a statistical measure of change to reflect the overall performance of the defined stocks effectively.

Indices can be excellent for trading, as they offer exposure to broad market movements and built-in diversification to reduce the risks.

Discover the best apps for trading the S&P 500, a leading U.S. index representing top companies across multiple sectors on the New York Stock Exchange and NASDAQ. Get ahead in the U.S. market with these selections.


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