FVIAX vs. FNBGX

Last updated Jun 4, 2026

FVIAX (Fidelity Advisor Government Income Fund Class A) and FNBGX (Fidelity Long-Term Treasury Bond Index Fund) are both Government Bonds funds from Fidelity. Over the past 5 years, FVIAX returned -0.82%/yr vs -5.10%/yr for FNBGX. Their correlation of 0.92 suggests significant overlap in exposure. FVIAX charges 0.77%/yr vs 0.03%/yr for FNBGX.

Performance

FVIAX vs. FNBGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Advisor Government Income Fund Class A (FVIAX) 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, FVIAX achieves a 0.19% return, which is significantly higher than FNBGX's 0.02% return.

FVIAX

• 1D: 0.00%
• 1M: 0.39%
• YTD: 0.19%
• 6M: -0.04%
• 1Y: 4.42%
• 3Y*: 2.60%
• 5Y*: -0.82%
• 10Y*: 0.46%

FNBGX

• 1D: 0.22%
• 1M: 1.23%
• YTD: 0.02%
• 6M: -1.23%
• 1Y: 5.75%
• 3Y*: -0.54%
• 5Y*: -5.10%
• 10Y*: —

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

FVIAX vs. FNBGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FVIAX Fidelity Advisor Government Income Fund Class A	0.19%	6.20%	-0.18%	3.64%	-13.30%	-2.54%	6.45%	6.06%	0.39%	-0.10%
FNBGX Fidelity Long-Term Treasury Bond Index Fund	0.02%	5.30%	-6.18%	3.20%	-29.89%	-5.17%	17.58%	14.24%	-1.62%	1.86%

Correlation

The correlation between FVIAX and FNBGX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (All Time) Calculated using the full available price history since Oct 20, 2017	0.92

The correlation between FVIAX and FNBGX has been stable across timeframes, ranging from 0.91 to 0.93 - a consistent structural relationship.

Return for Risk

FVIAX vs. FNBGX — Risk / Return Rank

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

FVIAX

FVIAX Risk / Return Rank: 16
FVIAX Sharpe Ratio Rank: 17
FVIAX Sortino Ratio Rank: 17
FVIAX Omega Ratio Rank: 16
FVIAX Calmar Ratio Rank: 16
FVIAX Martin Ratio Rank: 15

FNBGX

FNBGX Risk / Return Rank: 7
FNBGX Sharpe Ratio Rank: 8
FNBGX Sortino Ratio Rank: 7
FNBGX Omega Ratio Rank: 7
FNBGX Calmar Ratio Rank: 8
FNBGX Martin Ratio Rank: 7

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.

FVIAX vs. FNBGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Advisor Government Income Fund Class A (FVIAX) 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.

	FVIAX	FNBGX	Difference
Sharpe ratio: Return per unit of total volatility	1.15	0.63	+0.52
Sortino ratio: Return per unit of downside risk	1.73	0.96	+0.77
Omega ratio: Gain probability vs. loss probability	1.20	1.11	+0.09
Calmar ratio: Return relative to maximum drawdown	1.44	0.78	+0.66
Martin ratio: Return relative to average drawdown	4.24	2.06	+2.19
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FVIAX vs. FNBGX - Sharpe Ratio Comparison

The current FVIAX Sharpe Ratio is 1.15, which is higher than the FNBGX Sharpe Ratio of 0.63. The chart below compares the historical Sharpe Ratios of FVIAX 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.

Sharpe Ratios by Period

	FVIAX	FNBGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.15	0.63	+0.52
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.14	-0.35	+0.22
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.09	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.22	-0.07	+0.29

Drawdowns

FVIAX vs. FNBGX - Drawdown Comparison

The maximum FVIAX drawdown since its inception was -20.79%, smaller than the maximum FNBGX drawdown of -46.86%. Use the drawdown chart below to compare losses from any high point for FVIAX and FNBGX.

Drawdown Indicators

	FVIAX	FNBGX	Difference
Max Drawdown Largest peak-to-trough decline	-20.79%	-46.86%	+26.07%
Max Drawdown (1Y) Largest decline over 1 year	-3.00%	-7.28%	+4.28%
Max Drawdown (3Y) Largest decline over 3 years	-6.49%	-17.66%	+11.17%
Max Drawdown (5Y) Largest decline over 5 years	-18.57%	-41.54%	+22.97%
Max Drawdown (10Y) Largest decline over 10 years	-20.66%	—	—
Current Drawdown Current decline from peak	-8.52%	-37.24%	+28.72%
Average Drawdown Average peak-to-trough decline	-7.06%	-21.65%	+14.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.02%	2.74%	-1.72%

Volatility

FVIAX vs. FNBGX - Volatility Comparison

The current volatility for Fidelity Advisor Government Income Fund Class A (FVIAX) is 1.16%, while Fidelity Long-Term Treasury Bond Index Fund (FNBGX) has a volatility of 2.79%. This indicates that FVIAX 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

	FVIAX	FNBGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.16%	2.79%	-1.63%
Volatility (6M) Calculated over the trailing 6-month period	2.60%	6.13%	-3.53%
Volatility (1Y) Calculated over the trailing 1-year period	3.78%	9.03%	-5.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.10%	14.59%	-8.49%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.04%	14.20%	-9.16%

FVIAX vs. FNBGX - Expense Ratio Comparison

FVIAX has a 0.77% expense ratio, which is higher than FNBGX's 0.03% expense ratio.

Dividends

FVIAX vs. FNBGX - Dividend Comparison

FVIAX's dividend yield for the trailing twelve months is around 3.14%, less than FNBGX's 4.00% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNBGX Fidelity Long-Term Treasury Bond Index Fund	4.00%	3.88%	3.75%	3.20%	2.26%	2.47%	3.96%	2.63%	2.93%	0.70%	0.00%	0.00%
FVIAX Fidelity Advisor Government Income Fund Class A	3.14%	3.03%	2.93%	2.03%	0.86%	0.39%	2.07%	1.77%	1.75%	1.47%	2.34%	1.96%

Frequently Asked Questions

Can I hold both FVIAX and FNBGX in my portfolio?

With a correlation of 0.91, FVIAX and FNBGX 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, FVIAX or FNBGX?

FNBGX has higher volatility (2.79%) compared to FVIAX (1.16%). In terms of maximum drawdown, FVIAX dropped -20.79% vs FNBGX's -46.86%.

Which has better risk-adjusted returns?

FVIAX currently has the higher Sharpe Ratio (1.15 vs 0.63), 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.