PEDIX vs. CPTNX

Last updated Jun 4, 2026

PEDIX (PIMCO Extended Duration Fund) and CPTNX (American Century Government Bond Fund) are both Government Bonds funds. Over the past 10 years, PEDIX returned -2.96%/yr vs 0.86%/yr for CPTNX. Their correlation of 0.84 suggests significant overlap in exposure. PEDIX charges 0.50%/yr vs 0.47%/yr for CPTNX.

Performance

PEDIX vs. CPTNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Extended Duration Fund (PEDIX) and American Century Government Bond Fund (CPTNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PEDIX achieves a 0.05% return, which is significantly lower than CPTNX's 0.10% return. Over the past 10 years, PEDIX has underperformed CPTNX with an annualized return of -2.96%, while CPTNX has yielded a comparatively higher 0.86% annualized return.

PEDIX

• 1D: 0.32%
• 1M: 2.23%
• YTD: 0.05%
• 6M: -2.61%
• 1Y: 7.28%
• 3Y*: -3.87%
• 5Y*: -9.20%
• 10Y*: -2.96%

CPTNX

• 1D: 0.11%
• 1M: 0.33%
• YTD: 0.10%
• 6M: 0.12%
• 1Y: 5.19%
• 3Y*: 3.16%
• 5Y*: -0.52%
• 10Y*: 0.86%

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

PEDIX vs. CPTNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PEDIX PIMCO Extended Duration Fund	0.05%	3.01%	-12.61%	2.71%	-40.33%	-5.54%	24.68%	18.66%	-4.01%	13.85%
CPTNX American Century Government Bond Fund	0.10%	7.26%	0.32%	3.51%	-13.10%	-1.24%	6.71%	6.16%	0.57%	2.15%

Correlation

The correlation between PEDIX and CPTNX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Sep 1, 2006	0.84

The correlation between PEDIX and CPTNX has been stable across timeframes, ranging from 0.81 to 0.85 - a consistent structural relationship.

Return for Risk

PEDIX vs. CPTNX — Risk / Return Rank

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

PEDIX

PEDIX Risk / Return Rank: 6
PEDIX Sharpe Ratio Rank: 6
PEDIX Sortino Ratio Rank: 6
PEDIX Omega Ratio Rank: 6
PEDIX Calmar Ratio Rank: 6
PEDIX Martin Ratio Rank: 6

CPTNX

CPTNX Risk / Return Rank: 19
CPTNX Sharpe Ratio Rank: 19
CPTNX Sortino Ratio Rank: 21
CPTNX Omega Ratio Rank: 18
CPTNX Calmar Ratio Rank: 18
CPTNX Martin Ratio Rank: 18

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.

PEDIX vs. CPTNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Extended Duration Fund (PEDIX) and American Century Government Bond Fund (CPTNX). 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.

	PEDIX	CPTNX	Difference
Sharpe ratio: Return per unit of total volatility	0.47	1.25	-0.78
Sortino ratio: Return per unit of downside risk	0.77	1.88	-1.11
Omega ratio: Gain probability vs. loss probability	1.09	1.22	-0.13
Calmar ratio: Return relative to maximum drawdown	0.58	1.52	-0.94
Martin ratio: Return relative to average drawdown	1.42	4.83	-3.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PEDIX vs. CPTNX - Sharpe Ratio Comparison

The current PEDIX Sharpe Ratio is 0.47, which is lower than the CPTNX Sharpe Ratio of 1.25. The chart below compares the historical Sharpe Ratios of PEDIX and CPTNX, 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

	PEDIX	CPTNX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.47	1.25	-0.78
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.42	-0.08	-0.33
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.14	0.17	-0.32
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	1.15	-0.99

Drawdowns

PEDIX vs. CPTNX - Drawdown Comparison

The maximum PEDIX drawdown since its inception was -60.38%, which is greater than CPTNX's maximum drawdown of -19.73%. Use the drawdown chart below to compare losses from any high point for PEDIX and CPTNX.

Drawdown Indicators

	PEDIX	CPTNX	Difference
Max Drawdown Largest peak-to-trough decline	-60.38%	-19.73%	-40.65%
Max Drawdown (1Y) Largest decline over 1 year	-12.59%	-3.36%	-9.23%
Max Drawdown (3Y) Largest decline over 3 years	-26.97%	-7.26%	-19.71%
Max Drawdown (5Y) Largest decline over 5 years	-56.15%	-19.15%	-37.00%
Max Drawdown (10Y) Largest decline over 10 years	-60.38%	-19.73%	-40.65%
Current Drawdown Current decline from peak	-53.00%	-5.00%	-48.00%
Average Drawdown Average peak-to-trough decline	-21.19%	-2.29%	-18.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.10%	1.05%	+4.05%

Volatility

PEDIX vs. CPTNX - Volatility Comparison

PIMCO Extended Duration Fund (PEDIX) has a higher volatility of 4.78% compared to American Century Government Bond Fund (CPTNX) at 1.50%. This indicates that PEDIX's price experiences larger fluctuations and is considered to be riskier than CPTNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PEDIX	CPTNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.78%	1.50%	+3.28%
Volatility (6M) Calculated over the trailing 6-month period	10.56%	2.94%	+7.62%
Volatility (1Y) Calculated over the trailing 1-year period	15.39%	4.09%	+11.30%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.17%	6.29%	+15.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.55%	4.98%	+15.57%

PEDIX vs. CPTNX - Expense Ratio Comparison

PEDIX has a 0.50% expense ratio, which is higher than CPTNX's 0.47% expense ratio.

Dividends

PEDIX vs. CPTNX - Dividend Comparison

PEDIX's dividend yield for the trailing twelve months is around 3.77%, less than CPTNX's 4.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CPTNX American Century Government Bond Fund	4.01%	4.07%	4.22%	3.72%	1.84%	2.10%	2.09%	2.48%	2.49%	2.14%	2.28%	1.69%
PEDIX PIMCO Extended Duration Fund	3.77%	3.41%	1.86%	4.59%	3.02%	27.69%	22.31%	2.35%	3.91%	4.00%	8.05%	4.96%

Frequently Asked Questions

Can I hold both PEDIX and CPTNX in my portfolio?

PEDIX and CPTNX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PEDIX or CPTNX?

PEDIX has higher volatility (4.78%) compared to CPTNX (1.50%). In terms of maximum drawdown, PEDIX dropped -60.38% vs CPTNX's -19.73%.

Which has better risk-adjusted returns?

CPTNX currently has the higher Sharpe Ratio (1.25 vs 0.47), 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.