VBIUX vs. FSTAX

Last updated Jun 4, 2026

VBIUX (Vanguard Intermediate-Term Bond Index Fund Institutional Plus) and FSTAX (Fidelity Advisor Strategic Income Fund Class A) are both Total Bond Market funds. Over the past 10 years, VBIUX returned 1.89%/yr vs 4.02%/yr for FSTAX. A 0.52 correlation means they provide meaningful diversification when combined. VBIUX charges 0.04%/yr vs 0.97%/yr for FSTAX.

Performance

VBIUX vs. FSTAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Intermediate-Term Bond Index Fund Institutional Plus (VBIUX) and Fidelity Advisor Strategic Income Fund Class A (FSTAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBIUX achieves a -0.04% return, which is significantly lower than FSTAX's 3.19% return. Over the past 10 years, VBIUX has underperformed FSTAX with an annualized return of 1.89%, while FSTAX has yielded a comparatively higher 4.02% annualized return.

VBIUX

• 1D: 0.00%
• 1M: 0.37%
• YTD: -0.04%
• 6M: -0.25%
• 1Y: 5.09%
• 3Y*: 4.29%
• 5Y*: 0.29%
• 10Y*: 1.89%

FSTAX

• 1D: 0.17%
• 1M: 1.08%
• YTD: 3.19%
• 6M: 3.50%
• 1Y: 9.60%
• 3Y*: 7.53%
• 5Y*: 2.83%
• 10Y*: 4.02%

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

VBIUX vs. FSTAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBIUX Vanguard Intermediate-Term Bond Index Fund Institutional Plus	-0.04%	8.60%	1.56%	5.53%	-13.24%	-2.64%	9.83%	10.23%	-0.13%	3.90%
FSTAX Fidelity Advisor Strategic Income Fund Class A	3.19%	8.68%	4.93%	8.82%	-11.98%	3.22%	7.21%	10.74%	-2.94%	7.63%

Correlation

The correlation between VBIUX and FSTAX is 0.72, 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	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.77
Correlation (10Y) Calculated over the trailing 10-year period	0.62
Correlation (All Time) Calculated using the full available price history since Sep 28, 2011	0.52

The correlation between VBIUX and FSTAX shifts across timeframes, from 0.52 (all time) to 0.78 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

VBIUX vs. FSTAX — Risk / Return Rank

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

VBIUX

VBIUX Risk / Return Rank: 18
VBIUX Sharpe Ratio Rank: 19
VBIUX Sortino Ratio Rank: 19
VBIUX Omega Ratio Rank: 18
VBIUX Calmar Ratio Rank: 18
VBIUX Martin Ratio Rank: 16

FSTAX

FSTAX Risk / Return Rank: 86
FSTAX Sharpe Ratio Rank: 86
FSTAX Sortino Ratio Rank: 88
FSTAX Omega Ratio Rank: 86
FSTAX Calmar Ratio Rank: 82
FSTAX Martin Ratio Rank: 85

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.

VBIUX vs. FSTAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Intermediate-Term Bond Index Fund Institutional Plus (VBIUX) and Fidelity Advisor Strategic Income Fund Class A (FSTAX). 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.

	VBIUX	FSTAX	Difference
Sharpe ratio Return per unit of total volatility	1.24	2.81	-1.57
Sortino ratio Return per unit of downside risk	1.86	4.24	-2.38
Omega ratio Gain probability vs. loss probability	1.22	1.59	-0.38
Calmar ratio Return relative to maximum drawdown	1.54	3.74	-2.20
Martin ratio Return relative to average drawdown	4.54	16.22	-11.68
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VBIUX vs. FSTAX - Sharpe Ratio Comparison

The current VBIUX Sharpe Ratio is 1.24, which is lower than the FSTAX Sharpe Ratio of 2.81. The chart below compares the historical Sharpe Ratios of VBIUX and FSTAX, 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

	VBIUX	FSTAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.24	2.81	-1.57
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.05	0.63	-0.59
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.35	0.91	-0.56
Sharpe Ratio (All Time) Calculated using the full available price history	0.47	0.51	-0.04

Drawdowns

VBIUX vs. FSTAX - Drawdown Comparison

The maximum VBIUX drawdown since its inception was -19.18%, smaller than the maximum FSTAX drawdown of -23.29%. Use the drawdown chart below to compare losses from any high point for VBIUX and FSTAX.

Drawdown Indicators

	VBIUX	FSTAX	Difference
Max Drawdown Largest peak-to-trough decline	-19.18%	-23.29%	+4.11%
Max Drawdown (1Y) Largest decline over 1 year	-3.33%	-2.65%	-0.68%
Max Drawdown (3Y) Largest decline over 3 years	-6.05%	-4.04%	-2.01%
Max Drawdown (5Y) Largest decline over 5 years	-18.83%	-16.18%	-2.65%
Max Drawdown (10Y) Largest decline over 10 years	-19.18%	-16.18%	-3.00%
Current Drawdown Current decline from peak	-1.83%	0.00%	-1.83%
Average Drawdown Average peak-to-trough decline	-4.09%	-4.83%	+0.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.12%	0.61%	+0.51%

Volatility

VBIUX vs. FSTAX - Volatility Comparison

Vanguard Intermediate-Term Bond Index Fund Institutional Plus (VBIUX) and Fidelity Advisor Strategic Income Fund Class A (FSTAX) have volatilities of 1.37% and 1.35%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBIUX	FSTAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.37%	1.35%	+0.02%
Volatility (6M) Calculated over the trailing 6-month period	2.98%	2.89%	+0.09%
Volatility (1Y) Calculated over the trailing 1-year period	4.15%	3.54%	+0.61%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.39%	4.49%	+1.90%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.38%	4.44%	+0.94%

VBIUX vs. FSTAX - Expense Ratio Comparison

VBIUX has a 0.04% expense ratio, which is lower than FSTAX's 0.97% expense ratio.

Dividends

VBIUX vs. FSTAX - Dividend Comparison

VBIUX's dividend yield for the trailing twelve months is around 4.24%, more than FSTAX's 4.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSTAX Fidelity Advisor Strategic Income Fund Class A	4.01%	4.05%	3.21%	3.70%	2.70%	4.01%	4.32%	4.06%	3.50%	3.70%	3.49%	2.89%
VBIUX Vanguard Intermediate-Term Bond Index Fund Institutional Plus	4.24%	4.04%	3.82%	2.59%	2.42%	3.08%	2.95%	2.76%	2.89%	2.77%	3.09%	3.14%

Frequently Asked Questions

Can I hold both VBIUX and FSTAX in my portfolio?

VBIUX and FSTAX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VBIUX or FSTAX?

VBIUX has higher volatility (1.37%) compared to FSTAX (1.35%). In terms of maximum drawdown, VBIUX dropped -19.18% vs FSTAX's -23.29%.

Which has better risk-adjusted returns?

FSTAX currently has the higher Sharpe Ratio (2.81 vs 1.24), 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.