FSST vs. FSKAX

Last updated Jun 23, 2026

FSST (Fidelity Sustainability U.S. Equity ETF) and FSKAX (Fidelity Total Market Index Fund) are both funds - FSST is a Sustainable fund tracking the Russell 3000, while FSKAX is a Large Cap Blend Equities fund managed by Fidelity. Their correlation of 0.90 suggests significant overlap in exposure. FSST charges 0.59%/yr vs 0.01%/yr for FSKAX.

Performance

FSST vs. FSKAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Sustainability U.S. Equity ETF (FSST) and Fidelity Total Market Index Fund (FSKAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

FSST

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

FSKAX

• 1D: 1.15%
• 1M: 0.90%
• YTD: 10.81%
• 6M: 10.02%
• 1Y: 27.57%
• 3Y*: 20.73%
• 5Y*: 12.91%
• 10Y*: 15.04%

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

FSST vs. FSKAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
FSST Fidelity Sustainability U.S. Equity ETF	0.00%	15.40%	21.40%	25.49%	-18.30%	12.52%
FSKAX Fidelity Total Market Index Fund	10.81%	17.06%	23.89%	26.12%	-19.53%	10.97%

Correlation

The correlation between FSST and FSKAX is 0.47, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.47
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (All Time) Calculated using the full available price history since Jun 17, 2021	0.90

Over the past year, the correlation between FSST and FSKAX has dropped to 0.47 - well below their long-term average of 0.90, suggesting their price drivers have been diverging.

Return for Risk

FSST vs. FSKAX — Risk / Return Rank

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

FSST

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

FSKAX

FSKAX Risk / Return Rank: 65
FSKAX Sharpe Ratio Rank: 62
FSKAX Sortino Ratio Rank: 56
FSKAX Omega Ratio Rank: 57
FSKAX Calmar Ratio Rank: 70
FSKAX Martin Ratio Rank: 79

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.

FSST vs. FSKAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Sustainability U.S. Equity ETF (FSST) 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	FSST	FSKAX	Difference
Sharpe ratio: Return per unit of total volatility	—	2.13	—
Sortino ratio: Return per unit of downside risk	—	2.88	—
Omega ratio: Gain probability vs. loss probability	—	1.38	—
Calmar ratio: Return relative to maximum drawdown	—	3.08	—
Martin ratio: Return relative to average drawdown	—	13.71	—

Drawdowns

Drawdown Indicators

	FSST	FSKAX	Difference
Max Drawdown Largest peak-to-trough decline	—	-35.01%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-8.92%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-19.43%	—
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	—	-1.14%	—
Average Drawdown Average peak-to-trough decline	—	-4.01%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	2.00%	—

Volatility

Volatility by Period

	FSST	FSKAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.91%	—
Volatility (6M) Calculated over the trailing 6-month period	—	10.16%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	12.88%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	17.51%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	18.50%	—

FSST vs. FSKAX - Expense Ratio Comparison

FSST has a 0.59% expense ratio, which is higher than FSKAX's 0.02% expense ratio.

Dividends

FSST vs. FSKAX - Dividend Comparison

FSST has not paid dividends to shareholders, while FSKAX's dividend yield for the trailing twelve months is around 0.94%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSKAX Fidelity Total Market Index Fund	0.94%	1.01%	1.19%	1.41%	1.62%	1.15%	1.45%	1.94%	2.54%	2.07%	2.43%	0.82%
FSST Fidelity Sustainability U.S. Equity ETF	0.10%	0.19%	2.01%	0.68%	1.00%	0.34%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSST and FSKAX in my portfolio?

FSST and FSKAX have a correlation of 0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.