FNDSX vs. FTHRX

Last updated Jun 4, 2026

FNDSX (Fidelity Sustainability Bond Index Fund) and FTHRX (Fidelity Intermediate Bond Fund) are both Total Bond Market funds from Fidelity. Over the past 5 years, FNDSX returned 0.02%/yr vs 1.10%/yr for FTHRX. Their correlation of 0.92 suggests significant overlap in exposure. FNDSX charges 0.10%/yr vs 0.45%/yr for FTHRX.

Performance

FNDSX vs. FTHRX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Sustainability Bond Index Fund (FNDSX) and Fidelity Intermediate Bond Fund (FTHRX). 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 higher than FTHRX's 0.15% return.

FNDSX

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

FTHRX

• 1D: 0.00%
• 1M: 0.22%
• YTD: 0.15%
• 6M: 0.22%
• 1Y: 4.14%
• 3Y*: 4.54%
• 5Y*: 1.10%
• 10Y*: 2.04%

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

FNDSX vs. FTHRX - 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%
FTHRX Fidelity Intermediate Bond Fund	0.15%	6.89%	3.25%	5.55%	-9.17%	-1.60%	7.06%	7.20%	1.88%

Correlation

The correlation between FNDSX and FTHRX 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	0.94
Correlation (All Time) Calculated using the full available price history since Jun 20, 2018	0.92

The correlation between FNDSX and FTHRX has been stable across timeframes, ranging from 0.91 to 0.94 - a consistent structural relationship.

Return for Risk

FNDSX vs. FTHRX — 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

FTHRX

FTHRX Risk / Return Rank: 26
FTHRX Sharpe Ratio Rank: 26
FTHRX Sortino Ratio Rank: 30
FTHRX Omega Ratio Rank: 26
FTHRX Calmar Ratio Rank: 27
FTHRX Martin Ratio Rank: 22

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. FTHRX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Sustainability Bond Index Fund (FNDSX) and Fidelity Intermediate Bond Fund (FTHRX). 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	FTHRX	Difference
Sharpe ratio: Return per unit of total volatility	1.33	1.44	-0.11
Sortino ratio: Return per unit of downside risk	2.00	2.26	-0.26
Omega ratio: Gain probability vs. loss probability	1.24	1.27	-0.03
Calmar ratio: Return relative to maximum drawdown	1.79	1.92	-0.13
Martin ratio: Return relative to average drawdown	5.39	5.74	-0.35
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. FTHRX - Sharpe Ratio Comparison

The current FNDSX Sharpe Ratio is 1.33, which is comparable to the FTHRX Sharpe Ratio of 1.44. The chart below compares the historical Sharpe Ratios of FNDSX and FTHRX, 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	FTHRX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.33	1.44	-0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.00	0.27	-0.27
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.60	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.33	0.91	-0.58

Drawdowns

FNDSX vs. FTHRX - Drawdown Comparison

The maximum FNDSX drawdown since its inception was -19.72%, roughly equal to the maximum FTHRX drawdown of -19.01%. Use the drawdown chart below to compare losses from any high point for FNDSX and FTHRX.

Drawdown Indicators

	FNDSX	FTHRX	Difference
Max Drawdown Largest peak-to-trough decline	-19.72%	-19.01%	-0.71%
Max Drawdown (1Y) Largest decline over 1 year	-2.94%	-2.11%	-0.83%
Max Drawdown (3Y) Largest decline over 3 years	-6.11%	-2.68%	-3.43%
Max Drawdown (5Y) Largest decline over 5 years	-18.30%	-13.18%	-5.12%
Max Drawdown (10Y) Largest decline over 10 years	—	-13.25%	—
Current Drawdown Current decline from peak	-3.74%	-1.09%	-2.65%
Average Drawdown Average peak-to-trough decline	-6.50%	-3.07%	-3.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.98%	0.70%	+0.28%

Volatility

FNDSX vs. FTHRX - Volatility Comparison

Fidelity Sustainability Bond Index Fund (FNDSX) has a higher volatility of 1.31% compared to Fidelity Intermediate Bond Fund (FTHRX) at 0.91%. This indicates that FNDSX's price experiences larger fluctuations and is considered to be riskier than FTHRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNDSX	FTHRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.31%	0.91%	+0.40%
Volatility (6M) Calculated over the trailing 6-month period	2.81%	2.02%	+0.79%
Volatility (1Y) Calculated over the trailing 1-year period	3.98%	2.81%	+1.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.01%	4.03%	+1.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.31%	3.40%	+1.91%

FNDSX vs. FTHRX - Expense Ratio Comparison

FNDSX has a 0.10% expense ratio, which is lower than FTHRX's 0.45% expense ratio.

Dividends

FNDSX vs. FTHRX - Dividend Comparison

FNDSX's dividend yield for the trailing twelve months is around 3.95%, more than FTHRX's 3.69% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
FTHRX Fidelity Intermediate Bond Fund	3.69%	3.59%	3.49%	2.94%	1.55%	1.53%	4.16%	2.49%	2.48%	2.20%	2.63%	2.13%

Frequently Asked Questions

Can I hold both FNDSX and FTHRX in my portfolio?

With a correlation of 0.91, FNDSX and FTHRX 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 FTHRX?

FNDSX has higher volatility (1.31%) compared to FTHRX (0.91%). In terms of maximum drawdown, FNDSX dropped -19.72% vs FTHRX's -19.01%.

Which has better risk-adjusted returns?

FTHRX currently has the higher Sharpe Ratio (1.44 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.