DOXIX vs. SSFEX

Last updated Apr 1, 2026

Compare and contrast key facts about Dodge & Cox Income Fund Class X (DOXIX) and State Street Aggregate Bond Index Fund Class K (SSFEX).

DOXIX is an actively managed fund by Dodge & Cox. It was launched on May 2, 2022. SSFEX is managed by State Street.

Performance

DOXIX vs. SSFEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Dodge & Cox Income Fund Class X (DOXIX) and State Street Aggregate Bond Index Fund Class K (SSFEX). The values are adjusted to include any dividend payments, if applicable.

DOXIX vs. SSFEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
DOXIX Dodge & Cox Income Fund Class X	-0.17%	8.39%	2.33%	7.75%	-2.35%
SSFEX State Street Aggregate Bond Index Fund Class K	-0.17%	6.80%	1.35%	5.61%	-3.54%

Returns By Period

As of year-to-date, both investments have demonstrated similar returns, with DOXIX at -0.17% and SSFEX at -0.17%.

DOXIX

• 1D: 0.63%
• 1M: -2.30%
• YTD: -0.17%
• 6M: 1.13%
• 1Y: 5.17%
• 3Y*: 4.97%
• 5Y*: —
• 10Y*: —

SSFEX

• 1D: 0.53%
• 1M: -1.96%
• YTD: -0.17%
• 6M: 0.82%
• 1Y: 4.12%
• 3Y*: 3.42%
• 5Y*: 0.17%
• 10Y*: -19.27%

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

DOXIX vs. SSFEX - Expense Ratio Comparison

DOXIX has a 0.33% expense ratio, which is higher than SSFEX's 0.03% expense ratio.

DOXIX

Dodge & Cox Income Fund Class X

SSFEX

State Street Aggregate Bond Index Fund Class K

Return for Risk

DOXIX vs. SSFEX — Risk / Return Rank

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

DOXIX

DOXIX Risk / Return Rank: 67
DOXIX Sharpe Ratio Rank: 67
DOXIX Sortino Ratio Rank: 68
DOXIX Omega Ratio Rank: 53
DOXIX Calmar Ratio Rank: 84
DOXIX Martin Ratio Rank: 65

SSFEX

SSFEX Risk / Return Rank: 57
SSFEX Sharpe Ratio Rank: 55
SSFEX Sortino Ratio Rank: 54
SSFEX Omega Ratio Rank: 38
SSFEX Calmar Ratio Rank: 80
SSFEX Martin Ratio Rank: 56

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.

DOXIX vs. SSFEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Dodge & Cox Income Fund Class X (DOXIX) and State Street Aggregate Bond Index Fund Class K (SSFEX). 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.

	DOXIX	SSFEX	Difference
Sharpe ratio Return per unit of total volatility	1.18	1.04	+0.14
Sortino ratio Return per unit of downside risk	1.68	1.49	+0.18
Omega ratio Gain probability vs. loss probability	1.21	1.18	+0.03
Calmar ratio Return relative to maximum drawdown	2.06	1.96	+0.10
Martin ratio Return relative to average drawdown	6.15	5.43	+0.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

DOXIX vs. SSFEX - Sharpe Ratio Comparison

The current DOXIX Sharpe Ratio is 1.18, which is comparable to the SSFEX Sharpe Ratio of 1.04. The chart below compares the historical Sharpe Ratios of DOXIX and SSFEX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	DOXIX	SSFEX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.18	1.04	+0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.03	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	-0.61	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.68	-0.56	+1.24

Correlation

The correlation between DOXIX and SSFEX is 0.96, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

DOXIX vs. SSFEX - Dividend Comparison

DOXIX's dividend yield for the trailing twelve months is around 4.36%, more than SSFEX's 4.04% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DOXIX Dodge & Cox Income Fund Class X	4.36%	4.30%	4.32%	3.92%	2.30%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SSFEX State Street Aggregate Bond Index Fund Class K	4.04%	3.66%	3.76%	3.14%	2.48%	3.32%	9.59%	3.56%	2.79%	2.43%	2.19%	4.67%

Drawdowns

DOXIX vs. SSFEX - Drawdown Comparison

The maximum DOXIX drawdown since its inception was -8.83%, smaller than the maximum SSFEX drawdown of -92.70%. Use the drawdown chart below to compare losses from any high point for DOXIX and SSFEX.

Drawdown Indicators

	DOXIX	SSFEX	Difference
Max Drawdown Largest peak-to-trough decline	-8.83%	-92.70%	+83.87%
Max Drawdown (1Y) Largest decline over 1 year	-2.92%	-2.52%	-0.40%
Max Drawdown (5Y) Largest decline over 5 years	—	-17.99%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-92.70%	—
Current Drawdown Current decline from peak	-2.30%	-90.11%	+87.81%
Average Drawdown Average peak-to-trough decline	-1.87%	-47.36%	+45.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.98%	0.91%	+0.07%

Volatility

DOXIX vs. SSFEX - Volatility Comparison

Dodge & Cox Income Fund Class X (DOXIX) has a higher volatility of 1.80% compared to State Street Aggregate Bond Index Fund Class K (SSFEX) at 1.61%. This indicates that DOXIX's price experiences larger fluctuations and is considered to be riskier than SSFEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DOXIX	SSFEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.80%	1.61%	+0.19%
Volatility (6M) Calculated over the trailing 6-month period	2.76%	2.50%	+0.26%
Volatility (1Y) Calculated over the trailing 1-year period	4.57%	4.20%	+0.37%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.92%	5.91%	+0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.92%	31.83%	-25.91%