FXAIX vs. RPIDX

Last updated Jun 4, 2026

FXAIX (Fidelity 500 Index Fund) and RPIDX (T. Rowe Price Dynamic Credit Fund) are both mutual funds - FXAIX is a S&P 500 fund tracking the S&P 500 Index, while RPIDX is a Nontraditional Bonds fund managed by T. Rowe Price. Over the past 5 years, FXAIX returned 14.28%/yr vs 4.36%/yr for RPIDX. At a correlation of -0.02, they often move in opposite directions. FXAIX charges 0.02%/yr vs 0.63%/yr for RPIDX.

Performance

FXAIX vs. RPIDX - Performance Comparison

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

Returns By Period

In the year-to-date period, FXAIX achieves a 11.71% return, which is significantly higher than RPIDX's 0.16% return.

FXAIX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.71%
• 6M: 11.74%
• 1Y: 28.99%
• 3Y*: 22.75%
• 5Y*: 14.28%
• 10Y*: 15.66%

RPIDX

• 1D: -0.12%
• 1M: -0.75%
• YTD: 0.16%
• 6M: 0.98%
• 1Y: 6.90%
• 3Y*: 7.66%
• 5Y*: 4.36%
• 10Y*: —

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

FXAIX vs. RPIDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FXAIX Fidelity 500 Index Fund	11.71%	17.84%	25.01%	26.29%	-18.14%	28.71%	18.42%	27.53%
RPIDX T. Rowe Price Dynamic Credit Fund	0.16%	9.74%	9.92%	4.72%	-0.76%	6.21%	2.71%	6.87%

Correlation

The correlation between FXAIX and RPIDX is -0.06, 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	-0.06
Correlation (3Y) Calculated over the trailing 3-year period	0.08
Correlation (5Y) Calculated over the trailing 5-year period	0.01
Correlation (All Time) Calculated using the full available price history since Jan 15, 2019	-0.02

The correlation between FXAIX and RPIDX shifts across timeframes, from -0.06 (1 year) to 0.08 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

FXAIX vs. RPIDX — Risk / Return Rank

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

FXAIX

FXAIX Risk / Return Rank: 73
FXAIX Sharpe Ratio Rank: 76
FXAIX Sortino Ratio Rank: 67
FXAIX Omega Ratio Rank: 67
FXAIX Calmar Ratio Rank: 74
FXAIX Martin Ratio Rank: 83

RPIDX

RPIDX Risk / Return Rank: 76
RPIDX Sharpe Ratio Rank: 51
RPIDX Sortino Ratio Rank: 86
RPIDX Omega Ratio Rank: 76
RPIDX Calmar Ratio Rank: 93
RPIDX Martin Ratio Rank: 73

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.

FXAIX vs. RPIDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity 500 Index Fund (FXAIX) and T. Rowe Price Dynamic Credit Fund (RPIDX). 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.

	FXAIX	RPIDX	Difference
Sharpe ratio: Return per unit of total volatility	2.52	2.11	+0.41
Sortino ratio: Return per unit of downside risk	3.42	4.05	-0.62
Omega ratio: Gain probability vs. loss probability	1.46	1.49	-0.04
Calmar ratio: Return relative to maximum drawdown	3.36	5.25	-1.89
Martin ratio: Return relative to average drawdown	15.70	13.88	+1.82
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FXAIX vs. RPIDX - Sharpe Ratio Comparison

The current FXAIX Sharpe Ratio is 2.52, which is comparable to the RPIDX Sharpe Ratio of 2.11. The chart below compares the historical Sharpe Ratios of FXAIX and RPIDX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FXAIX	RPIDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.52	2.11	+0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.85	1.14	-0.30
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.87	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.82	1.11	-0.28

Drawdowns

FXAIX vs. RPIDX - Drawdown Comparison

The maximum FXAIX drawdown since its inception was -33.79%, which is greater than RPIDX's maximum drawdown of -19.95%. Use the drawdown chart below to compare losses from any high point for FXAIX and RPIDX.

Drawdown Indicators

	FXAIX	RPIDX	Difference
Max Drawdown Largest peak-to-trough decline	-33.79%	-19.95%	-13.84%
Max Drawdown (1Y) Largest decline over 1 year	-8.89%	-1.34%	-7.55%
Max Drawdown (3Y) Largest decline over 3 years	-18.76%	-3.17%	-15.59%
Max Drawdown (5Y) Largest decline over 5 years	-24.50%	-7.31%	-17.19%
Max Drawdown (10Y) Largest decline over 10 years	-33.79%	—	—
Current Drawdown Current decline from peak	0.00%	-0.86%	+0.86%
Average Drawdown Average peak-to-trough decline	-3.79%	-1.87%	-1.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	0.51%	+1.39%

Volatility

FXAIX vs. RPIDX - Volatility Comparison

Fidelity 500 Index Fund (FXAIX) has a higher volatility of 2.83% compared to T. Rowe Price Dynamic Credit Fund (RPIDX) at 0.64%. This indicates that FXAIX's price experiences larger fluctuations and is considered to be riskier than RPIDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FXAIX	RPIDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.83%	0.64%	+2.19%
Volatility (6M) Calculated over the trailing 6-month period	8.97%	2.58%	+6.39%
Volatility (1Y) Calculated over the trailing 1-year period	11.86%	3.35%	+8.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.91%	3.83%	+13.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.07%	4.80%	+13.27%

FXAIX vs. RPIDX - Expense Ratio Comparison

FXAIX has a 0.02% expense ratio, which is lower than RPIDX's 0.63% expense ratio.

Dividends

FXAIX vs. RPIDX - Dividend Comparison

FXAIX's dividend yield for the trailing twelve months is around 1.03%, less than RPIDX's 9.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FXAIX Fidelity 500 Index Fund	1.03%	1.11%	1.25%	1.45%	1.69%	1.22%	1.60%	2.06%	2.72%	1.97%	2.52%	2.83%
RPIDX T. Rowe Price Dynamic Credit Fund	9.93%	9.91%	9.20%	6.64%	7.97%	5.34%	7.14%	4.41%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FXAIX and RPIDX in my portfolio?

FXAIX and RPIDX have a correlation of -0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FXAIX or RPIDX?

FXAIX has higher volatility (2.83%) compared to RPIDX (0.64%). In terms of maximum drawdown, FXAIX dropped -33.79% vs RPIDX's -19.95%.

Which has better risk-adjusted returns?

FXAIX currently has the higher Sharpe Ratio (2.52 vs 2.11), 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.