Introduction
This article presents a structured, fact-based comparison of the MSCI World Momentum Index and the S&P 500 Index, focusing on their design, performance, volatility, and representative ETFs. The content is objective, accurate, and avoids speculation or promotional tone.
Index Definitions
MSCI World Momentum Index
The MSCI World Momentum Index selects stocks from the global developed markets (large- and mid-cap) that have demonstrated strong recent price trends, while maintaining liquidity and controlled portfolio turnover.
S&P 500 Index
The S&P 500 Index consists of 500 major U.S.-listed companies, chosen for market size, liquidity, and industry representation. It serves as a broad benchmark of U.S. equity market performance.
Performance Overview
Momentum strategies experienced notable performance in recent periods. For example, the iShares MSCI USA Momentum Factor ETF achieved returns of approximately 33–40%, well above the S&P 500’s return which ranged from ~25% to ~27%, depending on the specific fund and timeframe.
Momentum continued to show strength into early 2025, with the U.S. Momentum ETF gaining nearly 10%, compared to the S&P 500’s ~3% gain, marking a notable outperformance in a market environment where traditional large-cap names underperformed.
ETF-Based Comparison
A detailed comparison between the iShares Edge MSCI World Momentum Factor UCITS ETF (IWMO.L) and the SPDR S&P 500 ETF (SPY) reveals:
- Risk-adjusted metrics: IWMO.L shows higher figures across Sharpe, Sortino, Calmar, and Martin ratios.
- Volatility: IWMO.L exhibits standard deviation around 18.8%, slightly below SPY’s 19.9%.
- Drawdown: IWMO.L recorded a maximum drawdown around –31.5%, compared to SPY’s –55.2%.
- Year-to-date (YTD) return: IWMO.L (~13.9%) outpaced SPY (~8.5%).
- Long-term returns: Over 10 years, IWMO.L had an annualized return of ~12.6%, trailing SPY’s ~13.6%.
- Expense ratios: IWMO.L is higher-cost at ~0.25% versus SPY’s ~0.09%.
- Correlation: Moderate positive correlation (~0.5), indicating some diversification benefit.
Historical Returns & Risk Profile
Historical performance data for the MSCI World Momentum Index shows:
- Over five years, annualized return is near 13.8%, with an overall (since inception) return around 11.5%.
- Annual volatility is in the 16–17% range, with drawdowns up to approximately –52%.
- Risk-adjusted measures include a Sharpe ratio near 0.75 and Sortino ratio around 1.12.
In EUR terms:
- Five-year annualized return: ~17.1%, with overall return ~9.5%.
- Volatility: ~16.1% and drawdown: about –55%.
- Sharpe ratio: ~0.64, Sortino: ~0.98.
Strategy Insights
Momentum-based investments demonstrated strong performance in 2024 and early 2025, driven in part by concentrated gains in leading technology and healthcare stocks. In those periods, momentum ETFs outperformed both the S&P 500 and broader equity markets.
However, momentum strategies also showed underperformance in prior periods (e.g., 2021–2023), reflecting their sensitivity to trend reversals and sector rotation.
Summary Table
| Feature | MSCI World Momentum (via IWMO) | S&P 500 (via SPY) |
|---|---|---|
| Strategy focus | Global developed markets, momentum-tilt | Broad U.S. large-cap market |
| Sharpe Ratio | ~1.46 | ~1.16 |
| Volatility (Std Dev) | ~18.8% | ~19.9% |
| Max Drawdown | ~–31.5% | ~–55.2% |
| YTD Return | ~13.9% | ~8.5% |
| 10-Year Annualized Return | ~12.6% | ~13.6% |
| Expense Ratio | ~0.25% | ~0.09% |
| Correlation (ETF) | Moderate (~0.5) | Moderate (~0.5) |
| 5-Year Annualized Return | ~13.8% (USD), ~17.1% (EUR equivalente) | — |
| Volatility (Index, EUR) | ~16.1% | — |
| Historical Drawdown (EUR) | ~–52% to –55% | — |
Objective Perspective
The MSCI World Momentum Index (via IWMO) is characterized by strong relative performance in certain periods, better risk-adjusted metrics, and shallower drawdowns compared to the S&P 500 ETF SPY. It also maintains somewhat lower long-term volatility.
However, the S&P 500 has occasionally produced slightly higher long-term returns and operates at a substantially lower cost, with broader diversification in terms of sector and geographic exposure (focused solely on the U.S.).
Momentum strategies may excel during trending markets but can lag during reversals or sector rotations. Investors evaluating these indices should consider factors such as investment horizon, cost sensitivity, risk tolerance, and the desired balance between performance potential and resilience to market shifts.
This factual comparison offers clarity on the structural and performance-related distinctions between MSCI World Momentum and the S&P 500, facilitating informed evaluation of both strategies.
