FNSOX vs. BPRIX

Last updated Apr 1, 2026

Compare and contrast key facts about Fidelity Short-Term Bond Index Fund (FNSOX) and BlackRock Inflation Protected Bond Fund (BPRIX).

FNSOX is managed by Fidelity. It was launched on Oct 18, 2017. BPRIX is managed by BlackRock. It was launched on Jun 27, 2004.

Performance

FNSOX vs. BPRIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Short-Term Bond Index Fund (FNSOX) and BlackRock Inflation Protected Bond Fund (BPRIX). The values are adjusted to include any dividend payments, if applicable.

FNSOX vs. BPRIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FNSOX Fidelity Short-Term Bond Index Fund	-0.22%	6.01%	3.90%	4.90%	-5.76%	-1.25%	4.28%	4.95%	1.14%	-0.22%
BPRIX BlackRock Inflation Protected Bond Fund	0.00%	6.84%	1.41%	2.92%	-12.87%	5.76%	11.76%	8.33%	-1.85%	1.20%

Returns By Period

FNSOX

• 1D: 0.20%
• 1M: -1.18%
• YTD: -0.22%
• 6M: 0.91%
• 1Y: 3.69%
• 3Y*: 4.22%
• 5Y*: 1.56%
• 10Y*: —

BPRIX

• 1D: 0.62%
• 1M: -1.80%
• YTD: -0.00%
• 6M: -0.17%
• 1Y: 2.66%
• 3Y*: 2.38%
• 5Y*: 0.75%
• 10Y*: 2.39%

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

FNSOX vs. BPRIX - Expense Ratio Comparison

FNSOX has a 0.03% expense ratio, which is lower than BPRIX's 0.40% expense ratio.

BPRIX

BlackRock Inflation Protected Bond Fund

FNSOX

Fidelity Short-Term Bond Index Fund

Return for Risk

FNSOX vs. BPRIX — Risk / Return Rank

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

FNSOX

FNSOX Risk / Return Rank: 91
FNSOX Sharpe Ratio Rank: 89
FNSOX Sortino Ratio Rank: 93
FNSOX Omega Ratio Rank: 88
FNSOX Calmar Ratio Rank: 93
FNSOX Martin Ratio Rank: 91

BPRIX

BPRIX Risk / Return Rank: 44
BPRIX Sharpe Ratio Rank: 44
BPRIX Sortino Ratio Rank: 41
BPRIX Omega Ratio Rank: 36
BPRIX Calmar Ratio Rank: 55
BPRIX Martin Ratio Rank: 43

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.

FNSOX vs. BPRIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Short-Term Bond Index Fund (FNSOX) and BlackRock Inflation Protected Bond Fund (BPRIX). 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.

	FNSOX	BPRIX	Difference
Sharpe ratio Return per unit of total volatility	1.82	0.88	+0.94
Sortino ratio Return per unit of downside risk	2.83	1.25	+1.58
Omega ratio Gain probability vs. loss probability	1.37	1.17	+0.21
Calmar ratio Return relative to maximum drawdown	2.86	1.30	+1.56
Martin ratio Return relative to average drawdown	10.76	4.33	+6.43
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FNSOX vs. BPRIX - Sharpe Ratio Comparison

The current FNSOX Sharpe Ratio is 1.82, which is higher than the BPRIX Sharpe Ratio of 0.88. The chart below compares the historical Sharpe Ratios of FNSOX and BPRIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	FNSOX	BPRIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.82	0.88	+0.94
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.55	0.12	+0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.43	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.60	+0.23

Correlation

The correlation between FNSOX and BPRIX is 0.66, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

FNSOX vs. BPRIX - Dividend Comparison

FNSOX's dividend yield for the trailing twelve months is around 3.15%, less than BPRIX's 3.56% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNSOX Fidelity Short-Term Bond Index Fund	3.15%	3.22%	2.80%	1.74%	0.81%	0.80%	1.54%	2.61%	2.04%	0.34%	0.00%	0.00%
BPRIX BlackRock Inflation Protected Bond Fund	3.56%	4.47%	3.38%	2.48%	6.04%	6.39%	1.48%	2.34%	2.78%	2.20%	1.19%	2.07%

Drawdowns

FNSOX vs. BPRIX - Drawdown Comparison

The maximum FNSOX drawdown since its inception was -8.92%, smaller than the maximum BPRIX drawdown of -15.52%. Use the drawdown chart below to compare losses from any high point for FNSOX and BPRIX.

Drawdown Indicators

	FNSOX	BPRIX	Difference
Max Drawdown Largest peak-to-trough decline	-8.92%	-15.52%	+6.60%
Max Drawdown (1Y) Largest decline over 1 year	-1.47%	-3.22%	+1.75%
Max Drawdown (5Y) Largest decline over 5 years	-8.77%	-15.52%	+6.75%
Max Drawdown (10Y) Largest decline over 10 years	—	-15.52%	—
Current Drawdown Current decline from peak	-1.18%	-3.23%	+2.05%
Average Drawdown Average peak-to-trough decline	-1.75%	-3.82%	+2.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.39%	0.96%	-0.57%

Volatility

FNSOX vs. BPRIX - Volatility Comparison

The current volatility for Fidelity Short-Term Bond Index Fund (FNSOX) is 0.78%, while BlackRock Inflation Protected Bond Fund (BPRIX) has a volatility of 1.41%. This indicates that FNSOX experiences smaller price fluctuations and is considered to be less risky than BPRIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNSOX	BPRIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.78%	1.41%	-0.63%
Volatility (6M) Calculated over the trailing 6-month period	1.37%	2.28%	-0.91%
Volatility (1Y) Calculated over the trailing 1-year period	2.21%	4.28%	-2.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.86%	6.12%	-3.26%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.48%	5.52%	-3.04%