PFSI vs. FXAIX

Last updated Jun 24, 2026

PFSI (PennyMac Financial Services, Inc.) is a stock, while FXAIX (Fidelity 500 Index Fund) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, PFSI returned 20.84%/yr vs 15.80%/yr for FXAIX. At a 0.41 correlation, their price movements are largely independent.

Performance

PFSI vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PennyMac Financial Services, Inc. (PFSI) 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, PFSI achieves a -38.72% return, which is significantly lower than FXAIX's 9.79% return. Over the past 10 years, PFSI has outperformed FXAIX with an annualized return of 20.84%, while FXAIX has yielded a comparatively lower 15.80% annualized return.

PFSI

• 1D: 0.54%
• 1M: -6.57%
• YTD: -38.72%
• 6M: -39.31%
• 1Y: -16.27%
• 3Y*: 7.05%
• 5Y*: 6.07%
• 10Y*: 20.84%

FXAIX

• 1D: -0.37%
• 1M: 0.10%
• YTD: 9.79%
• 6M: 8.79%
• 1Y: 25.51%
• 3Y*: 21.39%
• 5Y*: 13.60%
• 10Y*: 15.80%

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

PFSI vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PFSI PennyMac Financial Services, Inc.	-38.72%	30.55%	16.79%	57.84%	-17.58%	7.69%	95.33%	60.72%	-3.09%	34.23%
FXAIX Fidelity 500 Index Fund	9.79%	17.84%	25.01%	26.29%	-18.14%	28.71%	18.42%	31.48%	-4.43%	21.82%

Correlation

The correlation between PFSI and FXAIX is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.34
Correlation (3Y) Calculated over the trailing 3-year period	0.45
Correlation (5Y) Calculated over the trailing 5-year period	0.52
Correlation (10Y) Calculated over the trailing 10-year period	0.44
Correlation (All Time) Calculated using the full available price history since May 9, 2013	0.41

The correlation between PFSI and FXAIX shifts across timeframes, from 0.34 (1 year) to 0.52 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

PFSI vs. FXAIX — Risk / Return Rank

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

PFSI

PFSI Risk / Return Rank: 29
PFSI Sharpe Ratio Rank: 27
PFSI Sortino Ratio Rank: 29
PFSI Omega Ratio Rank: 27
PFSI Calmar Ratio Rank: 32
PFSI Martin Ratio Rank: 32

FXAIX

FXAIX Risk / Return Rank: 65
FXAIX Sharpe Ratio Rank: 64
FXAIX Sortino Ratio Rank: 57
FXAIX Omega Ratio Rank: 59
FXAIX Calmar Ratio Rank: 68
FXAIX Martin Ratio Rank: 78

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.

PFSI vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PennyMac Financial Services, Inc. (PFSI) 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.

	PFSI	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	-0.35	2.15	-2.51
Sortino ratio: Return per unit of downside risk	-0.14	2.91	-3.05
Omega ratio: Gain probability vs. loss probability	0.97	1.39	-0.42
Calmar ratio: Return relative to maximum drawdown	-0.33	3.02	-3.35
Martin ratio: Return relative to average drawdown	-0.58	13.62	-14.20

PFSI vs. FXAIX - Sharpe Ratio Comparison

The current PFSI Sharpe Ratio is -0.35, which is lower than the FXAIX Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of PFSI 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

PFSI vs. FXAIX - Drawdown Comparison

The maximum PFSI drawdown since its inception was -56.49%, which is greater than FXAIX's maximum drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for PFSI and FXAIX.

Drawdown Indicators

	PFSI	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.49%	-33.79%	-22.70%
Max Drawdown (1Y) Largest decline over 1 year	-49.77%	-8.89%	-40.88%
Max Drawdown (3Y) Largest decline over 3 years	-49.77%	-18.76%	-31.01%
Max Drawdown (5Y) Largest decline over 5 years	-49.77%	-24.50%	-25.27%
Max Drawdown (10Y) Largest decline over 10 years	-56.49%	-33.79%	-22.70%
Current Drawdown Current decline from peak	-49.34%	-1.72%	-47.62%
Average Drawdown Average peak-to-trough decline	-17.28%	-3.79%	-13.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	28.04%	1.97%	+26.07%

Volatility

PFSI vs. FXAIX - Volatility Comparison

PennyMac Financial Services, Inc. (PFSI) has a higher volatility of 9.05% compared to Fidelity 500 Index Fund (FXAIX) at 4.68%. This indicates that PFSI's price experiences larger fluctuations and is considered to be riskier than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PFSI	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.05%	4.68%	+4.37%
Volatility (6M) Calculated over the trailing 6-month period	46.61%	9.84%	+36.77%
Volatility (1Y) Calculated over the trailing 1-year period	46.13%	12.50%	+33.63%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	36.57%	17.00%	+19.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	39.40%	18.12%	+21.28%

Dividends

PFSI vs. FXAIX - Dividend Comparison

PFSI's dividend yield for the trailing twelve months is around 1.50%, more than FXAIX's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FXAIX Fidelity 500 Index Fund	1.04%	1.11%	1.25%	1.45%	1.69%	1.22%	1.60%	2.06%	2.72%	1.97%	2.52%	2.83%
PFSI PennyMac Financial Services, Inc.	1.50%	0.91%	0.98%	0.91%	1.41%	1.15%	0.82%	0.35%	1.88%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both PFSI and FXAIX in my portfolio?

PFSI and FXAIX have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PFSI or FXAIX?

PFSI has higher volatility (9.05%) compared to FXAIX (4.68%). In terms of maximum drawdown, PFSI dropped -56.49% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

FXAIX currently has the higher Sharpe Ratio (2.15 vs -0.35), 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.