NEAIX vs. FTXFX

Last updated Jun 25, 2026

NEAIX (Needham Aggressive Growth Fund Institutional Class) and FTXFX (FullerThaler Behavioral Small-Cap Growth Fund Class R6) are both Small Cap Growth Equities funds. Both are actively managed. Over the past 5 years, NEAIX returned 22.83%/yr vs 14.76%/yr for FTXFX. Their correlation of 0.85 suggests significant overlap in exposure. NEAIX charges 1.20%/yr vs 0.93%/yr for FTXFX.

Performance

NEAIX vs. FTXFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Needham Aggressive Growth Fund Institutional Class (NEAIX) and FullerThaler Behavioral Small-Cap Growth Fund Class R6 (FTXFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NEAIX achieves a 58.23% return, which is significantly higher than FTXFX's 34.90% return.

NEAIX

• 1D: -3.79%
• 1M: 7.26%
• YTD: 58.23%
• 6M: 55.84%
• 1Y: 84.54%
• 3Y*: 38.40%
• 5Y*: 22.83%
• 10Y*: —

FTXFX

• 1D: -3.65%
• 1M: 3.29%
• YTD: 34.90%
• 6M: 31.66%
• 1Y: 63.68%
• 3Y*: 31.17%
• 5Y*: 14.76%
• 10Y*: —

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

NEAIX vs. FTXFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
NEAIX Needham Aggressive Growth Fund Institutional Class	58.23%	26.99%	14.86%	38.37%	-27.02%	38.46%	52.49%	44.68%	-17.25%
FTXFX FullerThaler Behavioral Small-Cap Growth Fund Class R6	34.90%	12.57%	28.99%	33.29%	-27.42%	25.60%	51.45%	19.27%	-3.62%

Correlation

The correlation between NEAIX and FTXFX is 0.85, 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	0.85
Correlation (3Y) Calculated over the trailing 3-year period	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (All Time) Calculated using the full available price history since Jan 12, 2018	0.85

The correlation between NEAIX and FTXFX has been stable across timeframes, ranging from 0.85 to 0.88 - a consistent structural relationship.

Return for Risk

NEAIX vs. FTXFX — Risk / Return Rank

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

NEAIX

NEAIX Risk / Return Rank: 92
NEAIX Sharpe Ratio Rank: 96
NEAIX Sortino Ratio Rank: 85
NEAIX Omega Ratio Rank: 82
NEAIX Calmar Ratio Rank: 97
NEAIX Martin Ratio Rank: 97

FTXFX

FTXFX Risk / Return Rank: 82
FTXFX Sharpe Ratio Rank: 84
FTXFX Sortino Ratio Rank: 68
FTXFX Omega Ratio Rank: 67
FTXFX Calmar Ratio Rank: 96
FTXFX Martin Ratio Rank: 96

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.

NEAIX vs. FTXFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Needham Aggressive Growth Fund Institutional Class (NEAIX) and FullerThaler Behavioral Small-Cap Growth Fund Class R6 (FTXFX). 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.

	NEAIX	FTXFX	Difference
Sharpe ratio: Return per unit of total volatility	3.20	2.41	+0.79
Sortino ratio: Return per unit of downside risk	3.68	2.93	+0.75
Omega ratio: Gain probability vs. loss probability	1.49	1.38	+0.11
Calmar ratio: Return relative to maximum drawdown	6.32	5.38	+0.94
Martin ratio: Return relative to average drawdown	24.79	21.17	+3.62

NEAIX vs. FTXFX - Sharpe Ratio Comparison

The current NEAIX Sharpe Ratio is 3.20, which is higher than the FTXFX Sharpe Ratio of 2.41. The chart below compares the historical Sharpe Ratios of NEAIX and FTXFX, 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

NEAIX vs. FTXFX - Drawdown Comparison

The maximum NEAIX drawdown since its inception was -35.93%, smaller than the maximum FTXFX drawdown of -44.96%. Use the drawdown chart below to compare losses from any high point for NEAIX and FTXFX.

Drawdown Indicators

	NEAIX	FTXFX	Difference
Max Drawdown Largest peak-to-trough decline	-35.93%	-44.96%	+9.03%
Max Drawdown (1Y) Largest decline over 1 year	-13.98%	-12.37%	-1.61%
Max Drawdown (3Y) Largest decline over 3 years	-28.21%	-32.36%	+4.15%
Max Drawdown (5Y) Largest decline over 5 years	-35.93%	-39.55%	+3.62%
Current Drawdown Current decline from peak	-3.79%	-3.65%	-0.14%
Average Drawdown Average peak-to-trough decline	-8.56%	-12.36%	+3.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.55%	3.14%	+0.41%

Volatility

NEAIX vs. FTXFX - Volatility Comparison

Needham Aggressive Growth Fund Institutional Class (NEAIX) has a higher volatility of 12.48% compared to FullerThaler Behavioral Small-Cap Growth Fund Class R6 (FTXFX) at 10.53%. This indicates that NEAIX's price experiences larger fluctuations and is considered to be riskier than FTXFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NEAIX	FTXFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.48%	10.53%	+1.95%
Volatility (6M) Calculated over the trailing 6-month period	22.55%	22.04%	+0.51%
Volatility (1Y) Calculated over the trailing 1-year period	27.60%	27.65%	-0.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.99%	27.04%	-2.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.77%	27.80%	-3.03%

NEAIX vs. FTXFX - Expense Ratio Comparison

NEAIX has a 1.20% expense ratio, which is higher than FTXFX's 0.93% expense ratio.

Dividends

NEAIX vs. FTXFX - Dividend Comparison

NEAIX's dividend yield for the trailing twelve months is around 1.27%, while FTXFX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FTXFX FullerThaler Behavioral Small-Cap Growth Fund Class R6	0.00%	0.00%	0.00%	0.00%	0.00%	16.94%	0.00%	0.00%	0.00%	0.00%
NEAIX Needham Aggressive Growth Fund Institutional Class	1.27%	2.01%	0.00%	0.00%	0.00%	6.84%	3.80%	10.42%	16.35%	5.14%

Frequently Asked Questions

Can I hold both NEAIX and FTXFX in my portfolio?

NEAIX and FTXFX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NEAIX or FTXFX?

NEAIX has higher volatility (12.48%) compared to FTXFX (10.53%). In terms of maximum drawdown, NEAIX dropped -35.93% vs FTXFX's -44.96%.

Which has better risk-adjusted returns?

NEAIX currently has the higher Sharpe Ratio (3.20 vs 2.41), 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.