FXIRX vs. FSPWX

Last updated Jun 5, 2026

FXIRX (PIMCO Fixed Income SHares: Series R) and FSPWX (Fidelity SAI Inflation-Protected Bond Index Fund) are both Inflation-Protected Bonds funds. Over the past year, FXIRX returned 5.83% vs 4.66% for FSPWX. Their correlation of 0.80 suggests significant overlap in exposure. FXIRX charges 0.87%/yr vs 0.05%/yr for FSPWX.

Performance

FXIRX vs. FSPWX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Fixed Income SHares: Series R (FXIRX) and Fidelity SAI Inflation-Protected Bond Index Fund (FSPWX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FXIRX achieves a 1.40% return, which is significantly lower than FSPWX's 1.63% return.

FXIRX

• 1D: -0.35%
• 1M: 0.34%
• YTD: 1.40%
• 6M: 0.86%
• 1Y: 5.83%
• 3Y*: 4.84%
• 5Y*: -0.06%
• 10Y*: 2.81%

FSPWX

• 1D: -0.20%
• 1M: -0.00%
• YTD: 1.63%
• 6M: 1.26%
• 1Y: 4.66%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

FXIRX vs. FSPWX - Yearly Performance Comparison

	2026 (YTD)	2025	2024
FXIRX PIMCO Fixed Income SHares: Series R	1.40%	9.44%	-2.49%
FSPWX Fidelity SAI Inflation-Protected Bond Index Fund	1.63%	6.76%	-1.32%

Correlation

The correlation between FXIRX and FSPWX is 0.71, 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	0.71
Correlation (All Time) Calculated using the full available price history since Aug 23, 2024	0.80

The correlation between FXIRX and FSPWX has been stable across timeframes, ranging from 0.71 to 0.80 - a consistent structural relationship.

Return for Risk

FXIRX vs. FSPWX — Risk / Return Rank

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

FXIRX

FXIRX Risk / Return Rank: 26
FXIRX Sharpe Ratio Rank: 22
FXIRX Sortino Ratio Rank: 23
FXIRX Omega Ratio Rank: 23
FXIRX Calmar Ratio Rank: 34
FXIRX Martin Ratio Rank: 26

FSPWX

FSPWX Risk / Return Rank: 37
FSPWX Sharpe Ratio Rank: 30
FSPWX Sortino Ratio Rank: 34
FSPWX Omega Ratio Rank: 31
FSPWX Calmar Ratio Rank: 50
FSPWX Martin Ratio Rank: 38

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.

FXIRX vs. FSPWX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Fixed Income SHares: Series R (FXIRX) and Fidelity SAI Inflation-Protected Bond Index Fund (FSPWX). 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.

	FXIRX	FSPWX	Difference
Sharpe ratio: Return per unit of total volatility	1.31	1.57	-0.26
Sortino ratio: Return per unit of downside risk	1.95	2.39	-0.45
Omega ratio: Gain probability vs. loss probability	1.24	1.29	-0.05
Calmar ratio: Return relative to maximum drawdown	2.13	2.67	-0.55
Martin ratio: Return relative to average drawdown	6.14	8.19	-2.05
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FXIRX vs. FSPWX - Sharpe Ratio Comparison

The current FXIRX Sharpe Ratio is 1.31, which is comparable to the FSPWX Sharpe Ratio of 1.57. The chart below compares the historical Sharpe Ratios of FXIRX and FSPWX, 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

	FXIRX	FSPWX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.31	1.57	-0.26
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.01	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.36	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.10	0.97	-0.87

Drawdowns

FXIRX vs. FSPWX - Drawdown Comparison

The maximum FXIRX drawdown since its inception was -28.64%, which is greater than FSPWX's maximum drawdown of -3.84%. Use the drawdown chart below to compare losses from any high point for FXIRX and FSPWX.

Drawdown Indicators

	FXIRX	FSPWX	Difference
Max Drawdown Largest peak-to-trough decline	-28.64%	-3.84%	-24.80%
Max Drawdown (1Y) Largest decline over 1 year	-3.77%	-1.95%	-1.82%
Max Drawdown (3Y) Largest decline over 3 years	-7.09%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-23.22%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-23.22%	—	—
Current Drawdown Current decline from peak	-5.90%	-0.20%	-5.70%
Average Drawdown Average peak-to-trough decline	-11.66%	-0.98%	-10.68%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.66%	0.63%	+1.03%

Volatility

FXIRX vs. FSPWX - Volatility Comparison

PIMCO Fixed Income SHares: Series R (FXIRX) has a higher volatility of 2.60% compared to Fidelity SAI Inflation-Protected Bond Index Fund (FSPWX) at 0.93%. This indicates that FXIRX's price experiences larger fluctuations and is considered to be riskier than FSPWX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FXIRX	FSPWX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.60%	0.93%	+1.67%
Volatility (6M) Calculated over the trailing 6-month period	4.46%	2.28%	+2.18%
Volatility (1Y) Calculated over the trailing 1-year period	6.13%	3.34%	+2.79%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.21%	4.06%	+5.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.90%	4.06%	+3.84%

FXIRX vs. FSPWX - Expense Ratio Comparison

FXIRX has a 0.87% expense ratio, which is higher than FSPWX's 0.05% expense ratio.

Dividends

FXIRX vs. FSPWX - Dividend Comparison

FXIRX's dividend yield for the trailing twelve months is around 3.52%, less than FSPWX's 3.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSPWX Fidelity SAI Inflation-Protected Bond Index Fund	3.76%	4.19%	0.69%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FXIRX PIMCO Fixed Income SHares: Series R	3.52%	2.58%	1.93%	1.89%	11.10%	6.03%	1.92%	2.53%	4.06%	2.93%

Frequently Asked Questions

Can I hold both FXIRX and FSPWX in my portfolio?

FXIRX and FSPWX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FXIRX or FSPWX?

FXIRX has higher volatility (2.60%) compared to FSPWX (0.93%). In terms of maximum drawdown, FXIRX dropped -28.64% vs FSPWX's -3.84%.

Which has better risk-adjusted returns?

FSPWX currently has the higher Sharpe Ratio (1.57 vs 1.31), 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.