SPX500 Lot Size Calculator
The S&P 500 (SPX500) is the benchmark index for the US stock market. It offers a balance of volatility and stability compared to the tech-heavy Nasdaq. Correct position sizing is key to trading the broader market moves.
SPX500 contract specifications vary more than any other index. Some brokers use 1 lot = $1 per point, others $10, others $50 (E-mini equivalent). Additionally, SPX500 is less volatile than US30 or NAS100 in terms of percentage moves, which might lead traders to oversize. Its strong correlation to VIX means position sizing should shrink as VIX rises.
Example Calculation
Step-by-step lot size calculation for SPX500:
The Formula
Step 1: Your Trading Parameters
Account Size
$10,000
Risk Per Trade
1%
Stop Loss
10 points
Step 2: Risk Amount
$100
Maximum loss per trade
Step 3: Lot Size
$100 ÷ (10 points × pip value)
1.0 lot (at $10/point)
Risk exactly $100 with 10 points SL
💡 Note: Lot size determines your risk, while leverage determines your margin requirement. With higher leverage (e.g., 1:100), you need less margin to open the same position, but your risk stays the same.
SPX500 Volatility: Moderate - Daily range 30-60 points typical
Frequently Asked Questions
Common questions about SPX500 lot sizing.
This page is part of our main Lot Size Calculator, which supports all forex pairs, indices, and crypto.
Standard CFD contract size is often 1 lot = 1 unit of the index (e.g., $1 per point or $10 per point depending on broker). Always verify "Contract Specification" in MT4/MT5 before trading.