Trade US500
S&P 500 Index
The S&P 500, the world's most tracked equity index, measuring the performance of 500 of the largest US-listed companies by market capitalization.
Price Chart
Specifications
Trade US500 on weekends
US500 is part of the StoicMarkets 24/7 group. A dedicated weekend instrument, US500.24-7, keeps quoting after the standard Friday close, so you can open, manage and close positions on Saturdays and Sundays. Weekend liquidity is thinner, so spreads can be wider than in weekday sessions.
Explore weekend tradingAbout US500 (S&P 500)
The US500 tracks the S&P 500 index, the most widely referenced benchmark for US equities and a proxy for the entire US stock market. Market-cap weighted and covering 500 companies, it captures approximately 80% of total US equity market capitalization. The index spans all major sectors including technology, healthcare, financials, consumer discretionary, energy, and industrials. It is rebalanced quarterly and responds to earnings seasons, Federal Reserve policy, and macroeconomic data releases. A notable concentration risk exists in the top holdings. The largest mega-cap technology stocks have accounted for a disproportionate share of index returns in recent years, meaning sector rotation decisions in the largest names can move the whole index. This makes the S&P 500 more tech-sensitive than its broad construction would suggest. The index serves as the global benchmark for equity performance. Trillions of dollars in passive index funds, ETFs, and pension allocations track it directly, which means index rebalancing and constituent changes create predictable fund flows. Institutional fund managers measure their performance against the S&P 500, making it the default standard for risk-adjusted returns.
Key Price Drivers
- Federal Reserve rate decisions and real yield movements
- Quarterly earnings seasons, particularly mega-cap tech results
- US macroeconomic data (CPI, NFP, PCE deflator, GDP)
- Sector rotation between growth and value, driven by rate expectations
Peak Trading Hours
The US500 CFD sees highest volume during US cash market hours with significant pre-market activity.
US cash session (13:30-20:00 UTC)
Futures-implied opens (12:00-13:30 UTC) often telegraph direction after overnight news. The first and last 30 minutes of the cash session produce the highest volume.
Trading Considerations for US500
Use the S&P 500 as the Market Baseline
The S&P 500 is the benchmark everything else is measured against. When you trade other indices, sectors, or stocks, compare their relative performance to the US500 to understand whether the move is market-wide or instrument-specific.
Track Earnings Season Dates
The S&P 500 has four earnings seasons per year (late January, late April, late July, late October). The index can move 5-10% in a single earnings season. The mega-cap reports in the first two weeks carry the most weight.
Watch the Fed Dot Plot
The Federal Reserve's quarterly Summary of Economic Projections (the "dot plot") shows where each FOMC member expects rates to go. Shifts in the median dot move the S&P 500 because they change the discount rate applied to all 500 companies' future earnings.
Monitor Breadth, Not Just the Index Level
A rising S&P 500 with narrowing breadth (fewer stocks participating) signals fragility. When only the top 7-10 stocks drive the index higher while the other 490 lag, the rally is concentrated and more vulnerable to rotation.
Key terms
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Frequently Asked Questions
Why is the S&P 500 considered the best measure of the US stock market?
It covers 500 companies weighted by float-adjusted market capitalization, capturing roughly 80% of total US equity value. Its breadth across sectors makes it more representative than the Dow Jones (30 stocks) or Nasdaq 100 (tech-skewed). Institutional managers benchmark against it.
What is Magnificent 7 concentration risk?
The seven largest US tech and growth companies (Apple, Microsoft, NVIDIA, Amazon, Meta, Alphabet, Tesla) represent an outsized share of S&P 500 market cap. When these stocks move together, they can drive the index in ways that don't reflect the other 493 constituents.
How does the Federal Reserve affect the S&P 500?
Rate decisions affect equity valuations through the discount rate applied to future earnings. Lower rates support higher multiples. Rising rates compress them. The S&P 500 is also sensitive to Fed language around economic outlook, which shapes earnings expectations across all 500 constituents.
How often is the S&P 500 rebalanced?
Quarterly. The committee adds and removes constituents based on market cap, liquidity, and financial viability. Index additions trigger buying from passive funds; removals trigger selling. These flows create short-term price pressure around announced changes.
What is the VIX and how does it relate to the S&P 500?
The VIX measures the market's expectation of 30-day volatility in the S&P 500, derived from options prices. A rising VIX indicates growing fear or uncertainty. A falling VIX suggests complacency. The VIX typically spikes when the S&P 500 drops sharply, creating an inverse relationship.
How does the S&P 500 differ from the Nasdaq 100?
The S&P 500 includes 500 companies across all sectors; the Nasdaq 100 has 100 non-financial companies weighted toward tech. The S&P 500 is broader and less volatile, while the Nasdaq 100 offers more concentrated exposure to growth and technology.
Can I trade US500 on a 10X account?
Yes. Index CFDs are available on StoicMarkets 10X accounts with up to 1:10 leverage on the amplified buying power.
What drives the S&P 500 during non-US hours?
Overnight, the S&P 500 futures react to Asian and European market moves, economic data releases from other regions, and geopolitical developments. These overnight moves set the futures-implied open for the US cash session at 13:30 UTC.
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CFDs are complex instruments and carry a high risk of rapid capital loss due to leverage. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.