PDMIX vs. BGNMX

Last updated Jun 6, 2026

PDMIX (PIMCO GNMA and Government Securities Fund) and BGNMX (American Century Ginnie Mae Fund) are both Government Bonds funds. Over the past 10 years, PDMIX returned 1.55%/yr vs 0.88%/yr for BGNMX. Their correlation of 0.87 suggests significant overlap in exposure. PDMIX charges 0.50%/yr vs 0.55%/yr for BGNMX.

Performance

PDMIX vs. BGNMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO GNMA and Government Securities Fund (PDMIX) and American Century Ginnie Mae Fund (BGNMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PDMIX achieves a 1.12% return, which is significantly higher than BGNMX's 0.62% return. Over the past 10 years, PDMIX has outperformed BGNMX with an annualized return of 1.55%, while BGNMX has yielded a comparatively lower 0.88% annualized return.

PDMIX

• 1D: 0.11%
• 1M: -0.39%
• YTD: 1.12%
• 6M: 1.52%
• 1Y: 6.64%
• 3Y*: 4.86%
• 5Y*: 0.26%
• 10Y*: 1.55%

BGNMX

• 1D: 0.00%
• 1M: -0.45%
• YTD: 0.62%
• 6M: 1.06%
• 1Y: 5.77%
• 3Y*: 3.76%
• 5Y*: -0.15%
• 10Y*: 0.88%

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

PDMIX vs. BGNMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDMIX PIMCO GNMA and Government Securities Fund	1.12%	8.43%	1.59%	6.03%	-13.96%	-0.65%	5.78%	6.57%	0.83%	2.06%
BGNMX American Century Ginnie Mae Fund	0.62%	7.43%	0.52%	4.72%	-12.06%	-1.79%	3.73%	6.17%	0.44%	1.22%

Correlation

The correlation between PDMIX and BGNMX is 0.96 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.96
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Aug 1, 1997	0.87

The correlation between PDMIX and BGNMX has been stable across timeframes, ranging from 0.87 to 0.96 - a consistent structural relationship.

Return for Risk

PDMIX vs. BGNMX — Risk / Return Rank

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

PDMIX

PDMIX Risk / Return Rank: 29
PDMIX Sharpe Ratio Rank: 28
PDMIX Sortino Ratio Rank: 29
PDMIX Omega Ratio Rank: 28
PDMIX Calmar Ratio Rank: 30
PDMIX Martin Ratio Rank: 30

BGNMX

BGNMX Risk / Return Rank: 26
BGNMX Sharpe Ratio Rank: 25
BGNMX Sortino Ratio Rank: 25
BGNMX Omega Ratio Rank: 26
BGNMX Calmar Ratio Rank: 27
BGNMX Martin Ratio Rank: 27

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.

PDMIX vs. BGNMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO GNMA and Government Securities Fund (PDMIX) and American Century Ginnie Mae Fund (BGNMX). 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.

	PDMIX	BGNMX	Difference
Sharpe ratio: Return per unit of total volatility	1.44	1.38	+0.06
Sortino ratio: Return per unit of downside risk	2.16	2.03	+0.13
Omega ratio: Gain probability vs. loss probability	1.27	1.25	+0.01
Calmar ratio: Return relative to maximum drawdown	1.96	1.81	+0.15
Martin ratio: Return relative to average drawdown	6.65	6.04	+0.61
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PDMIX vs. BGNMX - Sharpe Ratio Comparison

The current PDMIX Sharpe Ratio is 1.44, which is comparable to the BGNMX Sharpe Ratio of 1.38. The chart below compares the historical Sharpe Ratios of PDMIX and BGNMX, 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

	PDMIX	BGNMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.44	1.38	+0.06
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.04	-0.02	+0.06
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.31	0.18	+0.13
Sharpe Ratio (All Time) Calculated using the full available price history	1.03	0.94	+0.09

Drawdowns

PDMIX vs. BGNMX - Drawdown Comparison

The maximum PDMIX drawdown since its inception was -18.64%, roughly equal to the maximum BGNMX drawdown of -18.46%. Use the drawdown chart below to compare losses from any high point for PDMIX and BGNMX.

Drawdown Indicators

	PDMIX	BGNMX	Difference
Max Drawdown Largest peak-to-trough decline	-18.64%	-18.46%	-0.18%
Max Drawdown (1Y) Largest decline over 1 year	-3.24%	-3.07%	-0.17%
Max Drawdown (3Y) Largest decline over 3 years	-7.13%	-7.78%	+0.65%
Max Drawdown (5Y) Largest decline over 5 years	-18.59%	-17.74%	-0.85%
Max Drawdown (10Y) Largest decline over 10 years	-18.64%	-18.46%	-0.18%
Current Drawdown Current decline from peak	-1.45%	-1.72%	+0.27%
Average Drawdown Average peak-to-trough decline	-1.75%	-2.03%	+0.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.95%	0.92%	+0.03%

Volatility

PDMIX vs. BGNMX - Volatility Comparison

PIMCO GNMA and Government Securities Fund (PDMIX) has a higher volatility of 1.71% compared to American Century Ginnie Mae Fund (BGNMX) at 1.59%. This indicates that PDMIX's price experiences larger fluctuations and is considered to be riskier than BGNMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PDMIX	BGNMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.71%	1.59%	+0.12%
Volatility (6M) Calculated over the trailing 6-month period	3.27%	2.98%	+0.29%
Volatility (1Y) Calculated over the trailing 1-year period	4.46%	4.07%	+0.39%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.66%	6.45%	+0.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.06%	4.84%	+0.22%

PDMIX vs. BGNMX - Expense Ratio Comparison

PDMIX has a 0.50% expense ratio, which is lower than BGNMX's 0.55% expense ratio.

Dividends

PDMIX vs. BGNMX - Dividend Comparison

PDMIX's dividend yield for the trailing twelve months is around 4.30%, more than BGNMX's 3.94% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BGNMX American Century Ginnie Mae Fund	3.94%	3.86%	3.70%	3.21%	1.90%	1.64%	2.16%	2.68%	2.65%	2.37%	2.37%	2.37%
PDMIX PIMCO GNMA and Government Securities Fund	4.30%	4.29%	4.66%	3.76%	3.84%	2.03%	2.40%	3.41%	3.10%	2.96%	2.93%	2.14%

Frequently Asked Questions

Can I hold both PDMIX and BGNMX in my portfolio?

With a correlation of 0.96, PDMIX and BGNMX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, PDMIX or BGNMX?

PDMIX has higher volatility (1.71%) compared to BGNMX (1.59%). In terms of maximum drawdown, PDMIX dropped -18.64% vs BGNMX's -18.46%.

Which has better risk-adjusted returns?

PDMIX currently has the higher Sharpe Ratio (1.44 vs 1.38), 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.