FSKLX vs. FZROX

Last updated Jun 4, 2026

FSKLX (Fidelity SAI International Low Volatility Index Fund) and FZROX (Fidelity ZERO Total Market Index Fund) are both mutual funds - FSKLX is a Foreign Large Cap Equities fund managed by Fidelity, while FZROX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 5 years, FSKLX returned 5.48%/yr vs 13.30%/yr for FZROX. A 0.61 correlation means they provide meaningful diversification when combined. FSKLX charges 0.17%/yr vs 0.00%/yr for FZROX.

Performance

FSKLX vs. FZROX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI International Low Volatility Index Fund (FSKLX) and Fidelity ZERO Total Market Index Fund (FZROX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSKLX achieves a 3.96% return, which is significantly lower than FZROX's 12.01% return.

FSKLX

• 1D: -0.37%
• 1M: -1.03%
• YTD: 3.96%
• 6M: 6.12%
• 1Y: 9.07%
• 3Y*: 10.75%
• 5Y*: 5.48%
• 10Y*: 5.80%

FZROX

• 1D: 0.23%
• 1M: 5.79%
• YTD: 12.01%
• 6M: 11.92%
• 1Y: 29.16%
• 3Y*: 22.49%
• 5Y*: 13.30%
• 10Y*: —

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

FSKLX vs. FZROX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FSKLX Fidelity SAI International Low Volatility Index Fund	3.96%	21.95%	1.20%	13.84%	-13.48%	9.91%	-1.57%	16.12%	-4.00%
FZROX Fidelity ZERO Total Market Index Fund	12.01%	17.23%	23.94%	26.20%	-19.21%	26.00%	20.51%	31.15%	-12.72%

Correlation

The correlation between FSKLX and FZROX is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.42
Correlation (3Y) Calculated over the trailing 3-year period	0.48
Correlation (5Y) Calculated over the trailing 5-year period	0.56
Correlation (All Time) Calculated using the full available price history since Aug 17, 2018	0.61

The correlation between FSKLX and FZROX shifts across timeframes, from 0.42 (1 year) to 0.61 (all time), reflecting how their relationship changes across market environments.

Return for Risk

FSKLX vs. FZROX — Risk / Return Rank

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

FSKLX

FSKLX Risk / Return Rank: 9
FSKLX Sharpe Ratio Rank: 9
FSKLX Sortino Ratio Rank: 9
FSKLX Omega Ratio Rank: 9
FSKLX Calmar Ratio Rank: 9
FSKLX Martin Ratio Rank: 9

FZROX

FZROX Risk / Return Rank: 72
FZROX Sharpe Ratio Rank: 72
FZROX Sortino Ratio Rank: 65
FZROX Omega Ratio Rank: 63
FZROX Calmar Ratio Rank: 75
FZROX Martin Ratio Rank: 83

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.

FSKLX vs. FZROX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI International Low Volatility Index Fund (FSKLX) and Fidelity ZERO Total Market Index Fund (FZROX). 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.

	FSKLX	FZROX	Difference
Sharpe ratio: Return per unit of total volatility	0.76	2.47	-1.71
Sortino ratio: Return per unit of downside risk	1.15	3.36	-2.21
Omega ratio: Gain probability vs. loss probability	1.14	1.45	-0.30
Calmar ratio: Return relative to maximum drawdown	0.93	3.39	-2.47
Martin ratio: Return relative to average drawdown	2.57	15.66	-13.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FSKLX vs. FZROX - Sharpe Ratio Comparison

The current FSKLX Sharpe Ratio is 0.76, which is lower than the FZROX Sharpe Ratio of 2.47. The chart below compares the historical Sharpe Ratios of FSKLX and FZROX, 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

	FSKLX	FZROX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.76	2.47	-1.71
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.48	0.77	-0.29
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.49	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.73	-0.27

Drawdowns

FSKLX vs. FZROX - Drawdown Comparison

The maximum FSKLX drawdown since its inception was -27.26%, smaller than the maximum FZROX drawdown of -34.96%. Use the drawdown chart below to compare losses from any high point for FSKLX and FZROX.

Drawdown Indicators

	FSKLX	FZROX	Difference
Max Drawdown Largest peak-to-trough decline	-27.26%	-34.96%	+7.70%
Max Drawdown (1Y) Largest decline over 1 year	-8.64%	-8.89%	+0.25%
Max Drawdown (3Y) Largest decline over 3 years	-11.59%	-19.38%	+7.79%
Max Drawdown (5Y) Largest decline over 5 years	-24.99%	-25.12%	+0.13%
Max Drawdown (10Y) Largest decline over 10 years	-27.26%	—	—
Current Drawdown Current decline from peak	-6.75%	0.00%	-6.75%
Average Drawdown Average peak-to-trough decline	-5.14%	-5.51%	+0.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.12%	1.92%	+1.20%

Volatility

FSKLX vs. FZROX - Volatility Comparison

The current volatility for Fidelity SAI International Low Volatility Index Fund (FSKLX) is 2.68%, while Fidelity ZERO Total Market Index Fund (FZROX) has a volatility of 2.99%. This indicates that FSKLX experiences smaller price fluctuations and is considered to be less risky than FZROX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSKLX	FZROX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.68%	2.99%	-0.31%
Volatility (6M) Calculated over the trailing 6-month period	7.92%	9.22%	-1.30%
Volatility (1Y) Calculated over the trailing 1-year period	10.61%	12.22%	-1.61%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.51%	17.44%	-5.93%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.94%	20.13%	-8.19%

FSKLX vs. FZROX - Expense Ratio Comparison

FSKLX has a 0.17% expense ratio, which is higher than FZROX's 0.00% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FSKLX vs. FZROX - Dividend Comparison

FSKLX's dividend yield for the trailing twelve months is around 2.49%, more than FZROX's 0.91% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSKLX Fidelity SAI International Low Volatility Index Fund	2.49%	2.59%	2.09%	2.31%	2.01%	2.42%	1.32%	6.06%	2.64%	1.69%	2.85%	1.10%
FZROX Fidelity ZERO Total Market Index Fund	0.91%	1.02%	1.16%	1.36%	1.57%	1.25%	1.27%	1.51%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSKLX and FZROX in my portfolio?

FSKLX and FZROX have a correlation of 0.42, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSKLX or FZROX?

FZROX has higher volatility (2.99%) compared to FSKLX (2.68%). In terms of maximum drawdown, FSKLX dropped -27.26% vs FZROX's -34.96%.

Which has better risk-adjusted returns?

FZROX currently has the higher Sharpe Ratio (2.47 vs 0.76), 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.