DOXIX vs. FIFZX

Last updated Apr 1, 2026

Compare and contrast key facts about Dodge & Cox Income Fund Class X (DOXIX) and Fidelity Series Bond Index Fund (FIFZX).

DOXIX is an actively managed fund by Dodge & Cox. It was launched on May 2, 2022. FIFZX is managed by Fidelity. It was launched on Apr 26, 2019.

Performance

DOXIX vs. FIFZX - Performance Comparison

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

DOXIX vs. FIFZX - 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%
FIFZX Fidelity Series Bond Index Fund	-0.46%	7.15%	1.41%	5.54%	-4.05%

Returns By Period

In the year-to-date period, DOXIX achieves a -0.17% return, which is significantly higher than FIFZX's -0.46% return.

DOXIX

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

FIFZX

• 1D: 0.56%
• 1M: -2.27%
• YTD: -0.46%
• 6M: 0.53%
• 1Y: 3.78%
• 3Y*: 3.45%
• 5Y*: 0.10%
• 10Y*: —

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

DOXIX vs. FIFZX - Expense Ratio Comparison

DOXIX has a 0.33% expense ratio, which is higher than FIFZX's 0.00% expense ratio.

DOXIX

Dodge & Cox Income Fund Class X

FIFZX

Fidelity Series Bond Index Fund

Return for Risk

DOXIX vs. FIFZX — 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

FIFZX

FIFZX Risk / Return Rank: 55
FIFZX Sharpe Ratio Rank: 54
FIFZX Sortino Ratio Rank: 54
FIFZX Omega Ratio Rank: 39
FIFZX Calmar Ratio Rank: 76
FIFZX Martin Ratio Rank: 53

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. FIFZX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Dodge & Cox Income Fund Class X (DOXIX) and Fidelity Series Bond Index Fund (FIFZX). 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	FIFZX	Difference
Sharpe ratio Return per unit of total volatility	1.18	1.00	+0.18
Sortino ratio Return per unit of downside risk	1.68	1.45	+0.23
Omega ratio Gain probability vs. loss probability	1.21	1.18	+0.03
Calmar ratio Return relative to maximum drawdown	2.06	1.75	+0.30
Martin ratio Return relative to average drawdown	6.15	5.09	+1.06
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. FIFZX - Sharpe Ratio Comparison

The current DOXIX Sharpe Ratio is 1.18, which is comparable to the FIFZX Sharpe Ratio of 1.00. The chart below compares the historical Sharpe Ratios of DOXIX and FIFZX, 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	FIFZX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.18	1.00	+0.18
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.02	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.68	0.24	+0.44

Correlation

The correlation between DOXIX and FIFZX 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. FIFZX - Dividend Comparison

DOXIX's dividend yield for the trailing twelve months is around 4.36%, more than FIFZX's 3.62% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019
DOXIX Dodge & Cox Income Fund Class X	4.36%	4.30%	4.32%	3.92%	2.30%	0.00%	0.00%	0.00%
FIFZX Fidelity Series Bond Index Fund	3.62%	3.87%	3.66%	3.09%	1.74%	1.42%	3.20%	1.64%

Drawdowns

DOXIX vs. FIFZX - Drawdown Comparison

The maximum DOXIX drawdown since its inception was -8.83%, smaller than the maximum FIFZX drawdown of -19.27%. Use the drawdown chart below to compare losses from any high point for DOXIX and FIFZX.

Drawdown Indicators

	DOXIX	FIFZX	Difference
Max Drawdown Largest peak-to-trough decline	-8.83%	-19.27%	+10.44%
Max Drawdown (1Y) Largest decline over 1 year	-2.92%	-2.81%	-0.11%
Max Drawdown (5Y) Largest decline over 5 years	—	-18.47%	—
Current Drawdown Current decline from peak	-2.30%	-3.64%	+1.34%
Average Drawdown Average peak-to-trough decline	-1.87%	-6.79%	+4.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.98%	0.97%	+0.01%

Volatility

DOXIX vs. FIFZX - Volatility Comparison

Dodge & Cox Income Fund Class X (DOXIX) has a higher volatility of 1.80% compared to Fidelity Series Bond Index Fund (FIFZX) at 1.57%. This indicates that DOXIX's price experiences larger fluctuations and is considered to be riskier than FIFZX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DOXIX	FIFZX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.80%	1.57%	+0.23%
Volatility (6M) Calculated over the trailing 6-month period	2.76%	2.60%	+0.16%
Volatility (1Y) Calculated over the trailing 1-year period	4.57%	4.38%	+0.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.92%	6.04%	-0.12%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.92%	5.66%	+0.26%