TRPBX vs. FXAIX

Last updated Jun 13, 2026

TRPBX (T. Rowe Price Spectrum Moderate Allocation Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - TRPBX is a Diversified Portfolio fund managed by T. Rowe Price, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, TRPBX returned 8.73%/yr vs 15.44%/yr for FXAIX. Their correlation of 0.94 suggests significant overlap in exposure. TRPBX charges 0.51%/yr vs 0.02%/yr for FXAIX.

Performance

TRPBX vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Spectrum Moderate Allocation Fund (TRPBX) and Fidelity 500 Index Fund (FXAIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TRPBX achieves a 6.41% return, which is significantly lower than FXAIX's 8.59% return. Over the past 10 years, TRPBX has underperformed FXAIX with an annualized return of 8.73%, while FXAIX has yielded a comparatively higher 15.44% annualized return.

TRPBX

• 1D: 1.49%
• 1M: -0.11%
• YTD: 6.41%
• 6M: 6.94%
• 1Y: 15.63%
• 3Y*: 12.85%
• 5Y*: 5.57%
• 10Y*: 8.73%

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%

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

TRPBX vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TRPBX T. Rowe Price Spectrum Moderate Allocation Fund	6.41%	14.47%	10.24%	15.08%	-17.10%	10.54%	14.44%	21.61%	-4.46%	16.88%
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%

Correlation

The correlation between TRPBX and FXAIX is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since May 4, 2011	0.94

The correlation between TRPBX and FXAIX has been stable across timeframes, ranging from 0.92 to 0.94 - a consistent structural relationship.

Return for Risk

TRPBX vs. FXAIX — Risk / Return Rank

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

TRPBX

TRPBX Risk / Return Rank: 63
TRPBX Sharpe Ratio Rank: 64
TRPBX Sortino Ratio Rank: 64
TRPBX Omega Ratio Rank: 67
TRPBX Calmar Ratio Rank: 55
TRPBX Martin Ratio Rank: 67

FXAIX

FXAIX Risk / Return Rank: 73
FXAIX Sharpe Ratio Rank: 72
FXAIX Sortino Ratio Rank: 68
FXAIX Omega Ratio Rank: 69
FXAIX Calmar Ratio Rank: 73
FXAIX Martin Ratio Rank: 84

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.

TRPBX vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Spectrum Moderate Allocation Fund (TRPBX) and Fidelity 500 Index Fund (FXAIX). 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.

	TRPBX	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	1.90	1.97	-0.07
Sortino ratio: Return per unit of downside risk	2.68	2.67	+0.01
Omega ratio: Gain probability vs. loss probability	1.37	1.36	+0.01
Calmar ratio: Return relative to maximum drawdown	2.39	2.74	-0.36
Martin ratio: Return relative to average drawdown	10.42	12.46	-2.04

TRPBX vs. FXAIX - Sharpe Ratio Comparison

The current TRPBX Sharpe Ratio is 1.90, which is comparable to the FXAIX Sharpe Ratio of 1.97. The chart below compares the historical Sharpe Ratios of TRPBX and FXAIX, 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

TRPBX vs. FXAIX - Drawdown Comparison

The maximum TRPBX drawdown since its inception was -41.62%, which is greater than FXAIX's maximum drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for TRPBX and FXAIX.

Drawdown Indicators

	TRPBX	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-41.62%	-33.79%	-7.83%
Max Drawdown (1Y) Largest decline over 1 year	-6.72%	-8.89%	+2.17%
Max Drawdown (3Y) Largest decline over 3 years	-9.73%	-18.76%	+9.03%
Max Drawdown (5Y) Largest decline over 5 years	-23.21%	-24.50%	+1.29%
Max Drawdown (10Y) Largest decline over 10 years	-24.55%	-33.79%	+9.24%
Current Drawdown Current decline from peak	-1.15%	-2.79%	+1.64%
Average Drawdown Average peak-to-trough decline	-4.13%	-3.79%	-0.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.53%	1.95%	-0.42%

Volatility

TRPBX vs. FXAIX - Volatility Comparison

The current volatility for T. Rowe Price Spectrum Moderate Allocation Fund (TRPBX) is 3.34%, while Fidelity 500 Index Fund (FXAIX) has a volatility of 4.44%. This indicates that TRPBX experiences smaller price fluctuations and is considered to be less risky than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TRPBX	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.34%	4.44%	-1.10%
Volatility (6M) Calculated over the trailing 6-month period	7.06%	9.70%	-2.64%
Volatility (1Y) Calculated over the trailing 1-year period	8.41%	12.37%	-3.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.98%	16.99%	-7.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.57%	18.10%	-7.53%

TRPBX vs. FXAIX - Expense Ratio Comparison

TRPBX has a 0.51% expense ratio, which is higher than FXAIX's 0.02% expense ratio.

Dividends

TRPBX vs. FXAIX - Dividend Comparison

TRPBX's dividend yield for the trailing twelve months is around 7.99%, more than FXAIX's 1.06% 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%
TRPBX T. Rowe Price Spectrum Moderate Allocation Fund	7.99%	8.46%	6.87%	3.09%	7.38%	9.57%	4.90%	5.41%	8.82%	5.40%	2.76%	6.89%

Frequently Asked Questions

Can I hold both TRPBX and FXAIX in my portfolio?

With a correlation of 0.93, TRPBX and FXAIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, TRPBX or FXAIX?

FXAIX has higher volatility (4.44%) compared to TRPBX (3.34%). In terms of maximum drawdown, TRPBX dropped -41.62% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

FXAIX currently has the higher Sharpe Ratio (1.97 vs 1.90), 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.