FNDSX vs. FBND

Last updated Jun 4, 2026

FNDSX (Fidelity Sustainability Bond Index Fund) and FBND (Fidelity Total Bond ETF) are both funds - FNDSX is a Total Bond Market fund managed by Fidelity, while FBND is a Intermediate Core-Plus Bond fund actively managed by Fidelity. Over the past 5 years, FNDSX returned 0.02%/yr vs 0.83%/yr for FBND. Their correlation of 0.89 suggests significant overlap in exposure. FNDSX charges 0.10%/yr vs 0.36%/yr for FBND.

Performance

FNDSX vs. FBND - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Sustainability Bond Index Fund (FNDSX) and Fidelity Total Bond ETF (FBND). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FNDSX achieves a 0.42% return, which is significantly lower than FBND's 0.50% return.

FNDSX

• 1D: 0.00%
• 1M: 0.44%
• YTD: 0.42%
• 6M: 0.31%
• 1Y: 5.25%
• 3Y*: 3.92%
• 5Y*: 0.02%
• 10Y*: —

FBND

• 1D: -0.20%
• 1M: 0.31%
• YTD: 0.50%
• 6M: 0.30%
• 1Y: 5.59%
• 3Y*: 4.70%
• 5Y*: 0.83%
• 10Y*: 2.56%

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

FNDSX vs. FBND - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FNDSX Fidelity Sustainability Bond Index Fund	0.42%	7.03%	1.23%	5.44%	-13.34%	-2.22%	6.95%	8.30%	1.89%
FBND Fidelity Total Bond ETF	0.50%	7.57%	2.13%	6.81%	-12.54%	-0.43%	9.41%	9.82%	1.04%

Correlation

The correlation between FNDSX and FBND is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jun 20, 2018	0.89

The correlation between FNDSX and FBND has been stable across timeframes, ranging from 0.89 to 0.94 - a consistent structural relationship.

Return for Risk

FNDSX vs. FBND — Risk / Return Rank

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

FNDSX

FNDSX Risk / Return Rank: 22
FNDSX Sharpe Ratio Rank: 22
FNDSX Sortino Ratio Rank: 23
FNDSX Omega Ratio Rank: 21
FNDSX Calmar Ratio Rank: 23
FNDSX Martin Ratio Rank: 21

FBND

FBND Risk / Return Rank: 40
FBND Sharpe Ratio Rank: 40
FBND Sortino Ratio Rank: 42
FBND Omega Ratio Rank: 37
FBND Calmar Ratio Rank: 42
FBND Martin Ratio Rank: 39

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.

FNDSX vs. FBND - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Sustainability Bond Index Fund (FNDSX) and Fidelity Total Bond ETF (FBND). 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.

	FNDSX	FBND	Difference
Sharpe ratio: Return per unit of total volatility	1.33	1.46	-0.13
Sortino ratio: Return per unit of downside risk	2.00	2.17	-0.16
Omega ratio: Gain probability vs. loss probability	1.24	1.25	-0.01
Calmar ratio: Return relative to maximum drawdown	1.79	2.11	-0.31
Martin ratio: Return relative to average drawdown	5.39	6.37	-0.98
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FNDSX vs. FBND - Sharpe Ratio Comparison

The current FNDSX Sharpe Ratio is 1.33, which is comparable to the FBND Sharpe Ratio of 1.46. The chart below compares the historical Sharpe Ratios of FNDSX and FBND, 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

	FNDSX	FBND	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.33	1.46	-0.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.00	0.14	-0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.42	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.33	0.44	-0.11

Drawdowns

FNDSX vs. FBND - Drawdown Comparison

The maximum FNDSX drawdown since its inception was -19.72%, which is greater than FBND's maximum drawdown of -17.25%. Use the drawdown chart below to compare losses from any high point for FNDSX and FBND.

Drawdown Indicators

	FNDSX	FBND	Difference
Max Drawdown Largest peak-to-trough decline	-19.72%	-17.25%	-2.47%
Max Drawdown (1Y) Largest decline over 1 year	-2.94%	-2.66%	-0.28%
Max Drawdown (3Y) Largest decline over 3 years	-6.11%	-5.94%	-0.17%
Max Drawdown (5Y) Largest decline over 5 years	-18.30%	-17.25%	-1.05%
Max Drawdown (10Y) Largest decline over 10 years	—	-17.25%	—
Current Drawdown Current decline from peak	-3.74%	-1.43%	-2.31%
Average Drawdown Average peak-to-trough decline	-6.50%	-3.35%	-3.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.98%	0.88%	+0.10%

Volatility

FNDSX vs. FBND - Volatility Comparison

Fidelity Sustainability Bond Index Fund (FNDSX) and Fidelity Total Bond ETF (FBND) have volatilities of 1.31% and 1.27%, 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

	FNDSX	FBND	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.31%	1.27%	+0.04%
Volatility (6M) Calculated over the trailing 6-month period	2.81%	2.73%	+0.08%
Volatility (1Y) Calculated over the trailing 1-year period	3.98%	3.86%	+0.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.01%	5.92%	+0.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.31%	6.10%	-0.79%

FNDSX vs. FBND - Expense Ratio Comparison

FNDSX has a 0.10% expense ratio, which is lower than FBND's 0.36% expense ratio.

Dividends

FNDSX vs. FBND - Dividend Comparison

FNDSX's dividend yield for the trailing twelve months is around 3.95%, less than FBND's 4.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBND Fidelity Total Bond ETF	4.70%	4.70%	4.73%	4.26%	3.07%	1.86%	4.25%	2.90%	2.93%	2.56%	2.84%	3.26%
FNDSX Fidelity Sustainability Bond Index Fund	3.95%	3.84%	3.53%	2.84%	1.55%	1.17%	1.79%	3.17%	1.56%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FNDSX and FBND in my portfolio?

With a correlation of 0.92, FNDSX and FBND 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, FNDSX or FBND?

FNDSX has higher volatility (1.31%) compared to FBND (1.27%). In terms of maximum drawdown, FNDSX dropped -19.72% vs FBND's -17.25%.

Which has better risk-adjusted returns?

FBND currently has the higher Sharpe Ratio (1.46 vs 1.33), 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.