FTXSX vs. NESIX

Last updated Jun 3, 2026

FTXSX (FullerThaler Behavioral Small-Cap Growth Fund) and NESIX (Needham Small Cap Growth Fund Institutional) are both Small Cap Growth Equities funds. Over the past 5 years, FTXSX returned 15.41%/yr vs 9.94%/yr for NESIX. Their correlation of 0.82 suggests significant overlap in exposure. FTXSX charges 1.00%/yr vs 1.18%/yr for NESIX.

Performance

FTXSX vs. NESIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FullerThaler Behavioral Small-Cap Growth Fund (FTXSX) and Needham Small Cap Growth Fund Institutional (NESIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FTXSX achieves a 31.95% return, which is significantly lower than NESIX's 75.22% return.

FTXSX

• 1D: -0.44%
• 1M: 5.36%
• YTD: 31.95%
• 6M: 30.49%
• 1Y: 63.89%
• 3Y*: 30.15%
• 5Y*: 15.41%
• 10Y*: —

NESIX

• 1D: 1.51%
• 1M: 18.12%
• YTD: 75.22%
• 6M: 78.14%
• 1Y: 123.59%
• 3Y*: 32.00%
• 5Y*: 9.94%
• 10Y*: —

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

FTXSX vs. NESIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FTXSX FullerThaler Behavioral Small-Cap Growth Fund	31.95%	12.44%	28.86%	33.15%	-27.48%	25.50%	51.32%	19.19%	-3.71%
NESIX Needham Small Cap Growth Fund Institutional	75.22%	11.16%	13.47%	5.85%	-29.71%	11.36%	73.06%	55.28%	-8.08%

Correlation

The correlation between FTXSX and NESIX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (All Time) Calculated using the full available price history since Jan 16, 2018	0.82

The correlation between FTXSX and NESIX has been stable across timeframes, ranging from 0.82 to 0.85 - a consistent structural relationship.

Return for Risk

FTXSX vs. NESIX — Risk / Return Rank

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

FTXSX

FTXSX Risk / Return Rank: 73
FTXSX Sharpe Ratio Rank: 74
FTXSX Sortino Ratio Rank: 53
FTXSX Omega Ratio Rank: 53
FTXSX Calmar Ratio Rank: 93
FTXSX Martin Ratio Rank: 94

NESIX

NESIX Risk / Return Rank: 94
NESIX Sharpe Ratio Rank: 99
NESIX Sortino Ratio Rank: 91
NESIX Omega Ratio Rank: 86
NESIX Calmar Ratio Rank: 97
NESIX Martin Ratio Rank: 98

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.

FTXSX vs. NESIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FullerThaler Behavioral Small-Cap Growth Fund (FTXSX) and Needham Small Cap Growth Fund Institutional (NESIX). 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.

	FTXSX	NESIX	Difference
Sharpe ratio Return per unit of total volatility	2.50	4.16	-1.66
Sortino ratio Return per unit of downside risk	3.06	4.52	-1.46
Omega ratio Gain probability vs. loss probability	1.40	1.59	-0.18
Calmar ratio Return relative to maximum drawdown	5.19	7.05	-1.86
Martin ratio Return relative to average drawdown	21.11	29.28	-8.17
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FTXSX vs. NESIX - Sharpe Ratio Comparison

The current FTXSX Sharpe Ratio is 2.50, which is lower than the NESIX Sharpe Ratio of 4.16. The chart below compares the historical Sharpe Ratios of FTXSX and NESIX, 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

	FTXSX	NESIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.50	4.16	-1.66
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.58	0.34	+0.24
Sharpe Ratio (All Time) Calculated using the full available price history	0.66	0.73	-0.08

Drawdowns

FTXSX vs. NESIX - Drawdown Comparison

The maximum FTXSX drawdown since its inception was -45.03%, smaller than the maximum NESIX drawdown of -49.61%. Use the drawdown chart below to compare losses from any high point for FTXSX and NESIX.

Drawdown Indicators

	FTXSX	NESIX	Difference
Max Drawdown Largest peak-to-trough decline	-45.03%	-49.61%	+4.58%
Max Drawdown (1Y) Largest decline over 1 year	-12.37%	-17.12%	+4.75%
Max Drawdown (3Y) Largest decline over 3 years	-32.37%	-35.21%	+2.84%
Max Drawdown (5Y) Largest decline over 5 years	-39.58%	-49.61%	+10.03%
Current Drawdown Current decline from peak	-0.57%	0.00%	-0.57%
Average Drawdown Average peak-to-trough decline	-12.48%	-15.00%	+2.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.04%	4.12%	-1.08%

Volatility

FTXSX vs. NESIX - Volatility Comparison

FullerThaler Behavioral Small-Cap Growth Fund (FTXSX) and Needham Small Cap Growth Fund Institutional (NESIX) have volatilities of 8.29% and 8.14%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FTXSX	NESIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.29%	8.14%	+0.15%
Volatility (6M) Calculated over the trailing 6-month period	20.41%	20.86%	-0.45%
Volatility (1Y) Calculated over the trailing 1-year period	26.01%	30.10%	-4.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.72%	29.24%	-2.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.66%	26.42%	+1.24%

FTXSX vs. NESIX - Expense Ratio Comparison

FTXSX has a 1.00% expense ratio, which is lower than NESIX's 1.18% expense ratio.

Dividends

FTXSX vs. NESIX - Dividend Comparison

Neither FTXSX nor NESIX has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FTXSX FullerThaler Behavioral Small-Cap Growth Fund	0.00%	0.00%	0.00%	0.00%	0.00%	17.00%	0.00%	0.00%	0.00%	0.00%
NESIX Needham Small Cap Growth Fund Institutional	0.00%	0.00%	0.00%	0.00%	3.93%	23.92%	13.26%	8.25%	21.96%	8.89%

Frequently Asked Questions

Can I hold both FTXSX and NESIX in my portfolio?

FTXSX and NESIX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FTXSX or NESIX?

FTXSX has higher volatility (8.29%) compared to NESIX (8.14%). In terms of maximum drawdown, FTXSX dropped -45.03% vs NESIX's -49.61%.

Which has better risk-adjusted returns?

NESIX currently has the higher Sharpe Ratio (4.16 vs 2.50), 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.