PDIIX vs. FNBGX

Last updated Jun 24, 2026

PDIIX (PIMCO Diversified Income Fund) and FNBGX (Fidelity Long-Term Treasury Bond Index Fund) are both mutual funds - PDIIX is a Multisector Bonds fund managed by PIMCO, while FNBGX is a Government Bonds fund managed by Fidelity. Over the past 5 years, PDIIX returned 2.49%/yr vs -5.72%/yr for FNBGX. A 0.56 correlation means they provide meaningful diversification when combined. PDIIX charges 0.75%/yr vs 0.03%/yr for FNBGX.

Performance

PDIIX vs. FNBGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Diversified Income Fund (PDIIX) and Fidelity Long-Term Treasury Bond Index Fund (FNBGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PDIIX achieves a 1.54% return, which is significantly higher than FNBGX's 0.13% return.

PDIIX

• 1D: -0.20%
• 1M: 1.28%
• YTD: 1.54%
• 6M: 2.12%
• 1Y: 8.29%
• 3Y*: 8.58%
• 5Y*: 2.49%
• 10Y*: 4.32%

FNBGX

• 1D: -0.65%
• 1M: 1.91%
• YTD: 0.13%
• 6M: 0.25%
• 1Y: 4.01%
• 3Y*: -0.79%
• 5Y*: -5.72%
• 10Y*: —

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

PDIIX vs. FNBGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDIIX PIMCO Diversified Income Fund	1.54%	10.42%	6.35%	10.41%	-14.70%	0.42%	6.43%	13.05%	-0.97%	0.62%
FNBGX Fidelity Long-Term Treasury Bond Index Fund	0.13%	5.30%	-6.18%	3.20%	-29.89%	-5.17%	17.58%	14.24%	-1.62%	1.86%

Correlation

The correlation between PDIIX and FNBGX is 0.75, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.75
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (5Y) Calculated over the trailing 5-year period	0.69
Correlation (All Time) Calculated using the full available price history since Oct 19, 2017	0.56

The correlation between PDIIX and FNBGX shifts across timeframes, from 0.56 (all time) to 0.77 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

PDIIX vs. FNBGX — Risk / Return Rank

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

PDIIX

PDIIX Risk / Return Rank: 64
PDIIX Sharpe Ratio Rank: 68
PDIIX Sortino Ratio Rank: 80
PDIIX Omega Ratio Rank: 75
PDIIX Calmar Ratio Rank: 44
PDIIX Martin Ratio Rank: 51

FNBGX

FNBGX Risk / Return Rank: 6
FNBGX Sharpe Ratio Rank: 7
FNBGX Sortino Ratio Rank: 7
FNBGX Omega Ratio Rank: 6
FNBGX Calmar Ratio Rank: 7
FNBGX Martin Ratio Rank: 6

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.

PDIIX vs. FNBGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Diversified Income Fund (PDIIX) and Fidelity Long-Term Treasury Bond Index Fund (FNBGX). 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.

	PDIIX	FNBGX	Difference
Sharpe ratio: Return per unit of total volatility	2.21	0.50	+1.71
Sortino ratio: Return per unit of downside risk	3.49	0.78	+2.71
Omega ratio: Gain probability vs. loss probability	1.45	1.09	+0.36
Calmar ratio: Return relative to maximum drawdown	2.42	0.60	+1.82
Martin ratio: Return relative to average drawdown	9.85	1.51	+8.35

PDIIX vs. FNBGX - Sharpe Ratio Comparison

The current PDIIX Sharpe Ratio is 2.21, which is higher than the FNBGX Sharpe Ratio of 0.50. The chart below compares the historical Sharpe Ratios of PDIIX and FNBGX, 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

PDIIX vs. FNBGX - Drawdown Comparison

The maximum PDIIX drawdown since its inception was -21.96%, smaller than the maximum FNBGX drawdown of -46.86%. Use the drawdown chart below to compare losses from any high point for PDIIX and FNBGX.

Drawdown Indicators

	PDIIX	FNBGX	Difference
Max Drawdown Largest peak-to-trough decline	-21.96%	-46.86%	+24.90%
Max Drawdown (1Y) Largest decline over 1 year	-3.55%	-7.28%	+3.73%
Max Drawdown (3Y) Largest decline over 3 years	-4.27%	-17.66%	+13.39%
Max Drawdown (5Y) Largest decline over 5 years	-20.50%	-41.54%	+21.04%
Max Drawdown (10Y) Largest decline over 10 years	-20.50%	—	—
Current Drawdown Current decline from peak	-0.40%	-37.17%	+36.77%
Average Drawdown Average peak-to-trough decline	-2.81%	-21.73%	+18.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.87%	2.89%	-2.02%

Volatility

PDIIX vs. FNBGX - Volatility Comparison

The current volatility for PIMCO Diversified Income Fund (PDIIX) is 1.18%, while Fidelity Long-Term Treasury Bond Index Fund (FNBGX) has a volatility of 2.09%. This indicates that PDIIX experiences smaller price fluctuations and is considered to be less risky than FNBGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PDIIX	FNBGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.18%	2.09%	-0.91%
Volatility (6M) Calculated over the trailing 6-month period	3.21%	6.16%	-2.95%
Volatility (1Y) Calculated over the trailing 1-year period	3.89%	8.71%	-4.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.01%	14.54%	-9.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.89%	14.17%	-9.28%

PDIIX vs. FNBGX - Expense Ratio Comparison

PDIIX has a 0.75% expense ratio, which is higher than FNBGX's 0.03% expense ratio.

Dividends

PDIIX vs. FNBGX - Dividend Comparison

PDIIX's dividend yield for the trailing twelve months is around 5.52%, more than FNBGX's 3.99% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNBGX Fidelity Long-Term Treasury Bond Index Fund	3.99%	3.88%	3.75%	3.20%	2.26%	2.47%	3.96%	2.63%	2.93%	0.70%	0.00%	0.00%
PDIIX PIMCO Diversified Income Fund	5.52%	5.42%	5.18%	4.66%	3.91%	3.65%	3.68%	5.04%	4.46%	4.84%	4.94%	7.68%

Frequently Asked Questions

Can I hold both PDIIX and FNBGX in my portfolio?

PDIIX and FNBGX have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PDIIX or FNBGX?

FNBGX has higher volatility (2.09%) compared to PDIIX (1.18%). In terms of maximum drawdown, PDIIX dropped -21.96% vs FNBGX's -46.86%.

Which has better risk-adjusted returns?

PDIIX currently has the higher Sharpe Ratio (2.21 vs 0.50), 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.