RSP vs. SPAXX

Last updated Jun 16, 2026

RSP (Invesco S&P 500 Equal Weight ETF) and SPAXX (Fidelity Government Money Market Fund) are both funds - RSP is a S&P 500 fund tracking the S&P 500 Equal Weight Index, while SPAXX is a Money Market fund actively managed by Fidelity. RSP is passively managed, while SPAXX is actively managed. Over the past 5 years, RSP returned 8.93%/yr vs 1.45%/yr for SPAXX. At a 0.03 correlation, their price movements are largely independent. RSP charges 0.20%/yr vs 0.42%/yr for SPAXX.

Performance

RSP vs. SPAXX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco S&P 500 Equal Weight ETF (RSP) and Fidelity Government Money Market Fund (SPAXX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RSP achieves a 11.61% return, which is significantly higher than SPAXX's 1.37% return.

RSP

• 1D: 0.58%
• 1M: 5.62%
• YTD: 11.61%
• 6M: 10.84%
• 1Y: 22.05%
• 3Y*: 14.55%
• 5Y*: 8.93%
• 10Y*: 12.18%

SPAXX

• 1D: 0.00%
• 1M: 0.28%
• YTD: 1.37%
• 6M: 1.67%
• 1Y: 3.66%
• 3Y*: 2.42%
• 5Y*: 1.45%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

RSP vs. SPAXX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
RSP Invesco S&P 500 Equal Weight ETF	11.61%	11.21%	12.79%	13.70%	-11.62%	9.37%
SPAXX Fidelity Government Money Market Fund	1.37%	3.96%	1.54%	0.41%	0.00%	0.00%

Correlation

The correlation between RSP and SPAXX is 0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.04
Correlation (3Y) Calculated over the trailing 3-year period	0.04
Correlation (5Y) Calculated over the trailing 5-year period	0.03
Correlation (All Time) Calculated using the full available price history since May 25, 2021	0.03

Return for Risk

RSP vs. SPAXX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

RSP

RSP Risk / Return Rank: 63
RSP Sharpe Ratio Rank: 64
RSP Sortino Ratio Rank: 66
RSP Omega Ratio Rank: 60
RSP Calmar Ratio Rank: 62
RSP Martin Ratio Rank: 65

SPAXX

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

RSP vs. SPAXX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco S&P 500 Equal Weight ETF (RSP) and Fidelity Government Money Market Fund (SPAXX). 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.

	RSP	SPAXX	Difference
Sharpe ratio: Return per unit of total volatility	1.88	3.65	-1.77
Sortino ratio: Return per unit of downside risk	2.71	—	—
Omega ratio: Gain probability vs. loss probability	1.33	—	—
Calmar ratio: Return relative to maximum drawdown	2.82	—	—
Martin ratio: Return relative to average drawdown	10.69	—	—

RSP vs. SPAXX - Sharpe Ratio Comparison

The current RSP Sharpe Ratio is 1.88, which is lower than the SPAXX Sharpe Ratio of 3.65. The chart below compares the historical Sharpe Ratios of RSP and SPAXX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

RSP vs. SPAXX - Drawdown Comparison

The maximum RSP drawdown since its inception was -59.92%, which is greater than SPAXX's maximum drawdown of 0.00%. Use the drawdown chart below to compare losses from any high point for RSP and SPAXX.

Drawdown Indicators

	RSP	SPAXX	Difference
Max Drawdown Largest peak-to-trough decline	-59.92%	0.00%	-59.92%
Max Drawdown (1Y) Largest decline over 1 year	-7.85%	0.00%	-7.85%
Max Drawdown (3Y) Largest decline over 3 years	-17.81%	0.00%	-17.81%
Max Drawdown (5Y) Largest decline over 5 years	-21.38%	0.00%	-21.38%
Max Drawdown (10Y) Largest decline over 10 years	-39.04%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-6.64%	0.00%	-6.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.07%	0.00%	+2.07%

Volatility

RSP vs. SPAXX - Volatility Comparison

Invesco S&P 500 Equal Weight ETF (RSP) has a higher volatility of 3.59% compared to Fidelity Government Money Market Fund (SPAXX) at 0.28%. This indicates that RSP's price experiences larger fluctuations and is considered to be riskier than SPAXX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RSP	SPAXX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.59%	0.28%	+3.31%
Volatility (6M) Calculated over the trailing 6-month period	8.58%	0.66%	+7.92%
Volatility (1Y) Calculated over the trailing 1-year period	11.79%	1.03%	+10.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.23%	0.69%	+15.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.37%	0.69%	+17.68%

RSP vs. SPAXX - Expense Ratio Comparison

RSP has a 0.20% expense ratio, which is lower than SPAXX's 0.42% expense ratio.

Dividends

RSP vs. SPAXX - Dividend Comparison

RSP's dividend yield for the trailing twelve months is around 1.46%, less than SPAXX's 3.59% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RSP Invesco S&P 500 Equal Weight ETF	1.46%	1.64%	1.52%	1.64%	1.82%	1.28%	1.64%	1.69%	2.02%	1.52%	1.20%	1.70%
SPAXX Fidelity Government Money Market Fund	3.59%	3.88%	1.53%	0.41%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RSP and SPAXX in my portfolio?

RSP and SPAXX have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RSP or SPAXX?

RSP has higher volatility (3.59%) compared to SPAXX (0.28%). In terms of maximum drawdown, RSP dropped -59.92% vs SPAXX's 0.00%.

Which has better risk-adjusted returns?

SPAXX currently has the higher Sharpe Ratio (3.65 vs 1.88), 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.