FSTDX vs. FSKAX

Last updated Apr 1, 2026

Compare and contrast key facts about Fidelity Series 5+ Year Inflation-Protected Bond Index Fund (FSTDX) and Fidelity Total Market Index Fund (FSKAX).

FSTDX is managed by Fidelity. It was launched on Jan 17, 2022. FSKAX is managed by Fidelity.

Performance

FSTDX vs. FSKAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Series 5+ Year Inflation-Protected Bond Index Fund (FSTDX) and Fidelity Total Market Index Fund (FSKAX). The values are adjusted to include any dividend payments, if applicable.

FSTDX vs. FSKAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
FSTDX Fidelity Series 5+ Year Inflation-Protected Bond Index Fund	-0.13%	7.38%	-0.43%	2.84%	-19.06%	2.10%
FSKAX Fidelity Total Market Index Fund	-6.77%	17.06%	23.89%	26.12%	-19.53%	5.56%

Returns By Period

In the year-to-date period, FSTDX achieves a -0.13% return, which is significantly higher than FSKAX's -6.77% return.

FSTDX

• 1D: 0.93%
• 1M: -2.70%
• YTD: -0.13%
• 6M: -0.40%
• 1Y: 1.98%
• 3Y*: 1.57%
• 5Y*: —
• 10Y*: —

FSKAX

• 1D: -0.47%
• 1M: -7.69%
• YTD: -6.77%
• 6M: -4.56%
• 1Y: 14.73%
• 3Y*: 16.72%
• 5Y*: 10.13%
• 10Y*: 13.23%

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

FSTDX vs. FSKAX - Expense Ratio Comparison

FSTDX has a 0.00% expense ratio, which is lower than FSKAX's 0.02% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

FSKAX

Fidelity Total Market Index Fund

FSTDX

Fidelity Series 5+ Year Inflation-Protected Bond Index Fund

Return for Risk

FSTDX vs. FSKAX — Risk / Return Rank

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

FSTDX

FSTDX Risk / Return Rank: 17
FSTDX Sharpe Ratio Rank: 16
FSTDX Sortino Ratio Rank: 13
FSTDX Omega Ratio Rank: 12
FSTDX Calmar Ratio Rank: 26
FSTDX Martin Ratio Rank: 20

FSKAX

FSKAX Risk / Return Rank: 45
FSKAX Sharpe Ratio Rank: 40
FSKAX Sortino Ratio Rank: 44
FSKAX Omega Ratio Rank: 48
FSKAX Calmar Ratio Rank: 41
FSKAX Martin Ratio Rank: 52

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.

FSTDX vs. FSKAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Series 5+ Year Inflation-Protected Bond Index Fund (FSTDX) and Fidelity Total Market Index Fund (FSKAX). 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.

	FSTDX	FSKAX	Difference
Sharpe ratio Return per unit of total volatility	0.42	0.83	-0.41
Sortino ratio Return per unit of downside risk	0.60	1.29	-0.68
Omega ratio Gain probability vs. loss probability	1.08	1.19	-0.12
Calmar ratio Return relative to maximum drawdown	0.77	1.04	-0.27
Martin ratio Return relative to average drawdown	2.13	5.05	-2.92
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FSTDX vs. FSKAX - Sharpe Ratio Comparison

The current FSTDX Sharpe Ratio is 0.42, which is lower than the FSKAX Sharpe Ratio of 0.83. The chart below compares the historical Sharpe Ratios of FSTDX and FSKAX, 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

	FSTDX	FSKAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.42	0.83	-0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.59	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.72	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.22	0.78	-1.00

Correlation

The correlation between FSTDX and FSKAX is 0.16, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

FSTDX vs. FSKAX - Dividend Comparison

FSTDX's dividend yield for the trailing twelve months is around 4.39%, more than FSKAX's 1.09% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSTDX Fidelity Series 5+ Year Inflation-Protected Bond Index Fund	4.39%	4.38%	3.58%	3.28%	6.69%	0.88%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FSKAX Fidelity Total Market Index Fund	1.09%	1.01%	1.19%	1.41%	1.62%	1.15%	1.45%	1.94%	2.54%	2.07%	2.43%	0.82%

Drawdowns

FSTDX vs. FSKAX - Drawdown Comparison

The maximum FSTDX drawdown since its inception was -24.29%, smaller than the maximum FSKAX drawdown of -35.01%. Use the drawdown chart below to compare losses from any high point for FSTDX and FSKAX.

Drawdown Indicators

	FSTDX	FSKAX	Difference
Max Drawdown Largest peak-to-trough decline	-24.29%	-35.01%	+10.72%
Max Drawdown (1Y) Largest decline over 1 year	-4.64%	-12.42%	+7.78%
Max Drawdown (5Y) Largest decline over 5 years	—	-25.39%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-35.01%	—
Current Drawdown Current decline from peak	-11.89%	-8.92%	-2.97%
Average Drawdown Average peak-to-trough decline	-14.16%	-4.05%	-10.11%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.68%	2.57%	-0.89%

Volatility

FSTDX vs. FSKAX - Volatility Comparison

The current volatility for Fidelity Series 5+ Year Inflation-Protected Bond Index Fund (FSTDX) is 2.20%, while Fidelity Total Market Index Fund (FSKAX) has a volatility of 4.42%. This indicates that FSTDX experiences smaller price fluctuations and is considered to be less risky than FSKAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSTDX	FSKAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.20%	4.42%	-2.22%
Volatility (6M) Calculated over the trailing 6-month period	3.68%	9.40%	-5.72%
Volatility (1Y) Calculated over the trailing 1-year period	6.61%	18.50%	-11.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.60%	17.38%	-7.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.60%	18.42%	-8.82%