SSMKX vs. FTHMX

Last updated Jun 4, 2026

SSMKX (State Street Small/Mid Cap Equity Index Fund) and FTHMX (FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares) are both Mid Cap Blend Equities funds. Over the past year, SSMKX returned 29.82% vs 27.99% for FTHMX. Their correlation of 0.89 suggests significant overlap in exposure. SSMKX charges 0.04%/yr vs 0.83%/yr for FTHMX.

Performance

SSMKX vs. FTHMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Small/Mid Cap Equity Index Fund (SSMKX) and FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares (FTHMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with SSMKX having a 14.17% return and FTHMX slightly higher at 14.83%.

SSMKX

• 1D: 1.00%
• 1M: 5.71%
• YTD: 14.17%
• 6M: 13.00%
• 1Y: 29.82%
• 3Y*: 20.36%
• 5Y*: 7.43%
• 10Y*: 12.48%

FTHMX

• 1D: 0.59%
• 1M: 2.44%
• YTD: 14.83%
• 6M: 14.83%
• 1Y: 27.99%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SSMKX vs. FTHMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
SSMKX State Street Small/Mid Cap Equity Index Fund	14.17%	12.77%	17.20%	16.31%
FTHMX FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares	14.83%	12.89%	12.48%	11.60%

Correlation

The correlation between SSMKX and FTHMX is 0.86, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.86
Correlation (All Time) Calculated using the full available price history since Oct 3, 2023	0.89

The correlation between SSMKX and FTHMX has been stable across timeframes, ranging from 0.86 to 0.89 - a consistent structural relationship.

Return for Risk

SSMKX vs. FTHMX — Risk / Return Rank

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

SSMKX

SSMKX Risk / Return Rank: 48
SSMKX Sharpe Ratio Rank: 42
SSMKX Sortino Ratio Rank: 40
SSMKX Omega Ratio Rank: 37
SSMKX Calmar Ratio Rank: 67
SSMKX Martin Ratio Rank: 57

FTHMX

FTHMX Risk / Return Rank: 72
FTHMX Sharpe Ratio Rank: 63
FTHMX Sortino Ratio Rank: 66
FTHMX Omega Ratio Rank: 56
FTHMX Calmar Ratio Rank: 90
FTHMX Martin Ratio Rank: 86

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.

SSMKX vs. FTHMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Small/Mid Cap Equity Index Fund (SSMKX) and FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares (FTHMX). 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.

	SSMKX	FTHMX	Difference
Sharpe ratio: Return per unit of total volatility	1.88	2.35	-0.47
Sortino ratio: Return per unit of downside risk	2.63	3.40	-0.77
Omega ratio: Gain probability vs. loss probability	1.32	1.41	-0.09
Calmar ratio: Return relative to maximum drawdown	3.16	4.69	-1.52
Martin ratio: Return relative to average drawdown	11.48	16.43	-4.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SSMKX vs. FTHMX - Sharpe Ratio Comparison

The current SSMKX Sharpe Ratio is 1.88, which is comparable to the FTHMX Sharpe Ratio of 2.35. The chart below compares the historical Sharpe Ratios of SSMKX and FTHMX, 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

	SSMKX	FTHMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.88	2.35	-0.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.56	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.57	1.31	-0.74

Drawdowns

SSMKX vs. FTHMX - Drawdown Comparison

The maximum SSMKX drawdown since its inception was -41.65%, which is greater than FTHMX's maximum drawdown of -20.45%. Use the drawdown chart below to compare losses from any high point for SSMKX and FTHMX.

Drawdown Indicators

	SSMKX	FTHMX	Difference
Max Drawdown Largest peak-to-trough decline	-41.65%	-20.45%	-21.20%
Max Drawdown (1Y) Largest decline over 1 year	-10.03%	-6.33%	-3.70%
Max Drawdown (3Y) Largest decline over 3 years	-26.31%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-35.19%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-41.65%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-8.70%	-3.04%	-5.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.76%	1.80%	+0.96%

Volatility

SSMKX vs. FTHMX - Volatility Comparison

State Street Small/Mid Cap Equity Index Fund (SSMKX) has a higher volatility of 4.70% compared to FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares (FTHMX) at 3.45%. This indicates that SSMKX's price experiences larger fluctuations and is considered to be riskier than FTHMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SSMKX	FTHMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.70%	3.45%	+1.25%
Volatility (6M) Calculated over the trailing 6-month period	12.35%	9.36%	+2.99%
Volatility (1Y) Calculated over the trailing 1-year period	16.90%	12.65%	+4.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.25%	15.43%	+6.82%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.26%	15.43%	+6.83%

SSMKX vs. FTHMX - Expense Ratio Comparison

SSMKX has a 0.05% expense ratio, which is lower than FTHMX's 0.83% expense ratio.

Dividends

SSMKX vs. FTHMX - Dividend Comparison

SSMKX's dividend yield for the trailing twelve months is around 4.47%, more than FTHMX's 0.29% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
FTHMX FullerThaler Behavioral Mid-Cap Equity Fund Institutional Shares	0.29%	0.33%	0.28%	0.18%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SSMKX State Street Small/Mid Cap Equity Index Fund	4.47%	5.10%	2.12%	2.56%	17.09%	9.69%	1.47%	5.75%	3.68%	5.52%	1.30%

Frequently Asked Questions

Can I hold both SSMKX and FTHMX in my portfolio?

SSMKX and FTHMX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SSMKX or FTHMX?

SSMKX has higher volatility (4.70%) compared to FTHMX (3.45%). In terms of maximum drawdown, SSMKX dropped -41.65% vs FTHMX's -20.45%.

Which has better risk-adjusted returns?

FTHMX currently has the higher Sharpe Ratio (2.35 vs 1.88), 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.