LSSIX vs. FSKAX

Last updated Jun 23, 2026

LSSIX (Loomis Sayles Small Cap Growth Fund) and FSKAX (Fidelity Total Market Index Fund) are both mutual funds - LSSIX is a Small Cap Growth Equities fund managed by Loomis Sayles Funds, while FSKAX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 10 years, LSSIX returned 12.47%/yr vs 15.04%/yr for FSKAX. Their correlation of 0.86 suggests significant overlap in exposure. LSSIX charges 0.92%/yr vs 0.01%/yr for FSKAX.

Performance

LSSIX vs. FSKAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Loomis Sayles Small Cap Growth Fund (LSSIX) and Fidelity Total Market Index Fund (FSKAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, LSSIX achieves a 23.20% return, which is significantly higher than FSKAX's 10.81% return. Over the past 10 years, LSSIX has underperformed FSKAX with an annualized return of 12.47%, while FSKAX has yielded a comparatively higher 15.04% annualized return.

LSSIX

• 1D: 2.01%
• 1M: 8.25%
• YTD: 23.20%
• 6M: 19.61%
• 1Y: 33.75%
• 3Y*: 15.31%
• 5Y*: 6.02%
• 10Y*: 12.47%

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)

LSSIX vs. FSKAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
LSSIX Loomis Sayles Small Cap Growth Fund	23.20%	3.57%	14.94%	11.92%	-22.93%	9.91%	34.15%	26.59%	0.18%	26.85%
FSKAX Fidelity Total Market Index Fund	10.81%	17.06%	23.89%	26.12%	-19.53%	25.66%	20.79%	30.92%	-5.32%	20.85%

Correlation

The correlation between LSSIX and FSKAX is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Sep 8, 2011	0.86

The correlation between LSSIX and FSKAX shifts across timeframes, from 0.73 (1 year) to 0.86 (all time), reflecting how their relationship changes across market environments.

Return for Risk

LSSIX vs. FSKAX — Risk / Return Rank

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

LSSIX

LSSIX Risk / Return Rank: 61
LSSIX Sharpe Ratio Rank: 50
LSSIX Sortino Ratio Rank: 53
LSSIX Omega Ratio Rank: 43
LSSIX Calmar Ratio Rank: 83
LSSIX Martin Ratio Rank: 77

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.

LSSIX vs. FSKAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Loomis Sayles Small Cap Growth Fund (LSSIX) 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.

	LSSIX	FSKAX	Difference
Sharpe ratio: Return per unit of total volatility	1.92	2.13	-0.21
Sortino ratio: Return per unit of downside risk	2.79	2.88	-0.09
Omega ratio: Gain probability vs. loss probability	1.33	1.38	-0.05
Calmar ratio: Return relative to maximum drawdown	3.58	3.08	+0.50
Martin ratio: Return relative to average drawdown	13.48	13.71	-0.24

LSSIX vs. FSKAX - Sharpe Ratio Comparison

The current LSSIX Sharpe Ratio is 1.92, which is comparable to the FSKAX Sharpe Ratio of 2.13. The chart below compares the historical Sharpe Ratios of LSSIX and FSKAX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

LSSIX vs. FSKAX - Drawdown Comparison

The maximum LSSIX drawdown since its inception was -83.41%, which is greater than FSKAX's maximum drawdown of -35.01%. Use the drawdown chart below to compare losses from any high point for LSSIX and FSKAX.

Drawdown Indicators

	LSSIX	FSKAX	Difference
Max Drawdown Largest peak-to-trough decline	-83.41%	-35.01%	-48.40%
Max Drawdown (1Y) Largest decline over 1 year	-10.77%	-8.92%	-1.85%
Max Drawdown (3Y) Largest decline over 3 years	-27.73%	-19.43%	-8.30%
Max Drawdown (5Y) Largest decline over 5 years	-37.42%	-25.39%	-12.03%
Max Drawdown (10Y) Largest decline over 10 years	-38.52%	-35.01%	-3.51%
Current Drawdown Current decline from peak	0.00%	-1.14%	+1.14%
Average Drawdown Average peak-to-trough decline	-34.45%	-4.01%	-30.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.73%	2.00%	+0.73%

Volatility

LSSIX vs. FSKAX - Volatility Comparison

Loomis Sayles Small Cap Growth Fund (LSSIX) has a higher volatility of 6.18% compared to Fidelity Total Market Index Fund (FSKAX) at 4.91%. This indicates that LSSIX's price experiences larger fluctuations and is considered to be riskier than FSKAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	LSSIX	FSKAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.18%	4.91%	+1.27%
Volatility (6M) Calculated over the trailing 6-month period	15.10%	10.16%	+4.94%
Volatility (1Y) Calculated over the trailing 1-year period	20.03%	12.88%	+7.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.48%	17.51%	+4.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.81%	18.50%	+4.31%

LSSIX vs. FSKAX - Expense Ratio Comparison

LSSIX has a 0.92% expense ratio, which is higher than FSKAX's 0.02% expense ratio.

Dividends

LSSIX vs. FSKAX - Dividend Comparison

LSSIX's dividend yield for the trailing twelve months is around 6.19%, more than FSKAX's 0.94% yield.

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%
LSSIX Loomis Sayles Small Cap Growth Fund	6.19%	7.62%	3.64%	2.34%	3.02%	20.23%	1.76%	8.86%	11.30%	12.61%	0.00%	7.91%

Frequently Asked Questions

Can I hold both LSSIX and FSKAX in my portfolio?

LSSIX and FSKAX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, LSSIX or FSKAX?

LSSIX has higher volatility (6.18%) compared to FSKAX (4.91%). In terms of maximum drawdown, LSSIX dropped -83.41% vs FSKAX's -35.01%.

Which has better risk-adjusted returns?

FSKAX currently has the higher Sharpe Ratio (2.13 vs 1.92), 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.