FXAIX vs. IDMO
FXAIX (Fidelity 500 Index Fund) and IDMO (Invesco S&P International Developed Momentum ETF) are both funds - FXAIX is a S&P 500 fund tracking the S&P 500 Index, while IDMO is a Momentum fund tracking the S&P Momentum Developed ex U.S. & South Korea LargeMidCap Index. Both are passively managed. Over the past 10 years, FXAIX returned 15.44%/yr vs 12.64%/yr for IDMO. A 0.53 correlation means they provide meaningful diversification when combined. FXAIX charges 0.02%/yr vs 0.25%/yr for IDMO.
Performance
FXAIX vs. IDMO - Performance Comparison
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Returns By Period
The year-to-date returns for both stocks are quite close, with FXAIX having a 8.59% return and IDMO slightly lower at 8.17%. Over the past 10 years, FXAIX has outperformed IDMO with an annualized return of 15.44%, while IDMO has yielded a comparatively lower 12.64% annualized return.
FXAIX
- 1D
- 1.76%
- 1M
- -0.55%
- YTD
- 8.59%
- 6M
- 8.94%
- 1Y
- 23.79%
- 3Y*
- 21.06%
- 5Y*
- 13.34%
- 10Y*
- 15.44%
IDMO
- 1D
- 1.36%
- 1M
- -1.92%
- YTD
- 8.17%
- 6M
- 10.09%
- 1Y
- 23.12%
- 3Y*
- 25.21%
- 5Y*
- 15.50%
- 10Y*
- 12.64%
FXAIX vs. IDMO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FXAIX Fidelity 500 Index Fund | 8.59% | 17.84% | 25.01% | 26.29% | -18.14% | 28.71% | 18.42% | 31.48% | -4.43% | 21.82% |
IDMO Invesco S&P International Developed Momentum ETF | 8.17% | 42.17% | 12.79% | 20.16% | -12.03% | 14.31% | 22.01% | 26.09% | -16.66% | 29.21% |
Correlation
The correlation between FXAIX and IDMO is 0.75, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.75 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.70 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.73 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.62 |
Correlation (All Time) Calculated using the full available price history since Feb 24, 2012 | 0.53 |
Over the past year, FXAIX and IDMO have become more correlated (0.75) than their long-term average of 0.53, meaning their price movements have been converging.
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Return for Risk
FXAIX vs. IDMO — Risk / Return Rank
FXAIX
IDMO
FXAIX vs. IDMO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity 500 Index Fund (FXAIX) and Invesco S&P International Developed Momentum ETF (IDMO). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| FXAIX | IDMO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.68 | ||
| Sortino ratioReturn per unit of downside risk | +0.75 | ||
| Omega ratioGain probability vs. loss probability | 1.36 | 1.24 | +0.11 |
| Calmar ratioReturn relative to maximum drawdown | 2.74 | 1.89 | +0.85 |
| Martin ratioReturn relative to average drawdown | 12.46 | 7.64 | +4.82 |
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Drawdowns
FXAIX vs. IDMO - Drawdown Comparison
The maximum FXAIX drawdown since its inception was -33.79%, smaller than the maximum IDMO drawdown of -39.38%. Use the drawdown chart below to compare losses from any high point for FXAIX and IDMO.
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Drawdown Indicators
| FXAIX | IDMO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -33.79% | -39.38% | +5.59% |
Max Drawdown (1Y)Largest decline over 1 year | -8.89% | -12.31% | +3.42% |
Max Drawdown (3Y)Largest decline over 3 years | -18.76% | -12.65% | -6.11% |
Max Drawdown (5Y)Largest decline over 5 years | -24.50% | -27.07% | +2.57% |
Max Drawdown (10Y)Largest decline over 10 years | -33.79% | -31.34% | -2.45% |
Current DrawdownCurrent decline from peak | -2.79% | -1.92% | -0.87% |
Average DrawdownAverage peak-to-trough decline | -3.79% | -9.74% | +5.95% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.95% | 3.04% | -1.09% |
Volatility
FXAIX vs. IDMO - Volatility Comparison
The current volatility for Fidelity 500 Index Fund (FXAIX) is 4.44%, while Invesco S&P International Developed Momentum ETF (IDMO) has a volatility of 7.92%. This indicates that FXAIX experiences smaller price fluctuations and is considered to be less risky than IDMO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FXAIX | IDMO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.44% | 7.92% | -3.48% |
Volatility (6M)Calculated over the trailing 6-month period | 9.70% | 16.02% | -6.32% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.37% | 17.92% | -5.55% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.99% | 18.03% | -1.04% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.10% | 18.18% | -0.08% |
FXAIX vs. IDMO - Expense Ratio Comparison
FXAIX has a 0.02% expense ratio, which is lower than IDMO's 0.25% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
FXAIX vs. IDMO - Dividend Comparison
FXAIX's dividend yield for the trailing twelve months is around 1.06%, less than IDMO's 3.52% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FXAIX Fidelity 500 Index Fund | 1.06% | 1.11% | 1.25% | 1.45% | 1.69% | 1.22% | 1.60% | 2.06% | 2.72% | 1.97% | 2.52% | 2.83% |
IDMO Invesco S&P International Developed Momentum ETF | 3.52% | 3.71% | 2.24% | 2.89% | 3.66% | 1.81% | 1.63% | 2.78% | 3.27% | 3.08% | 2.18% | 2.52% |
Frequently Asked Questions
FXAIX and IDMO have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IDMO has higher volatility (7.92%) compared to FXAIX (4.44%). In terms of maximum drawdown, FXAIX dropped -33.79% vs IDMO's -39.38%.
FXAIX currently has the higher Sharpe Ratio (1.97 vs 1.30), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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