NAEFX vs. VTSAX

Last updated Jun 23, 2026

NAEFX (New Alternatives Fund Investor Class) and VTSAX (Vanguard Total Stock Market Index Fund Admiral Shares) are both mutual funds - NAEFX is a Alternative Energy Equities fund actively managed by New Alternatives, while VTSAX is a Large Cap Blend Equities fund managed by Vanguard. Over the past 10 years, NAEFX returned 10.64%/yr vs 15.06%/yr for VTSAX. A 0.61 correlation means they provide meaningful diversification when combined. NAEFX charges 1.28%/yr vs 0.04%/yr for VTSAX.

Performance

NAEFX vs. VTSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in New Alternatives Fund Investor Class (NAEFX) and Vanguard Total Stock Market Index Fund Admiral Shares (VTSAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NAEFX achieves a 17.64% return, which is significantly higher than VTSAX's 10.72% return. Over the past 10 years, NAEFX has underperformed VTSAX with an annualized return of 10.64%, while VTSAX has yielded a comparatively higher 15.06% annualized return.

NAEFX

• 1D: 1.53%
• 1M: 0.26%
• YTD: 17.64%
• 6M: 17.48%
• 1Y: 29.88%
• 3Y*: 9.50%
• 5Y*: 2.87%
• 10Y*: 10.64%

VTSAX

• 1D: 1.14%
• 1M: 0.90%
• YTD: 10.72%
• 6M: 9.93%
• 1Y: 27.56%
• 3Y*: 20.66%
• 5Y*: 12.87%
• 10Y*: 15.06%

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

NAEFX vs. VTSAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NAEFX New Alternatives Fund Investor Class	17.64%	27.81%	-6.26%	-2.74%	-16.08%	-5.02%	61.33%	36.68%	-7.13%	20.92%
VTSAX Vanguard Total Stock Market Index Fund Admiral Shares	10.72%	17.12%	23.23%	26.51%	-19.52%	25.72%	20.98%	30.79%	-5.18%	21.16%

Correlation

The correlation between NAEFX and VTSAX is 0.64, 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	0.64
Correlation (3Y) Calculated over the trailing 3-year period	0.57
Correlation (5Y) Calculated over the trailing 5-year period	0.62
Correlation (10Y) Calculated over the trailing 10-year period	0.61
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016	0.61

The correlation between NAEFX and VTSAX has been stable across timeframes, ranging from 0.57 to 0.64 - a consistent structural relationship.

Return for Risk

NAEFX vs. VTSAX — Risk / Return Rank

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

NAEFX

NAEFX Risk / Return Rank: 59
NAEFX Sharpe Ratio Rank: 52
NAEFX Sortino Ratio Rank: 47
NAEFX Omega Ratio Rank: 46
NAEFX Calmar Ratio Rank: 86
NAEFX Martin Ratio Rank: 62

VTSAX

VTSAX Risk / Return Rank: 65
VTSAX Sharpe Ratio Rank: 63
VTSAX Sortino Ratio Rank: 57
VTSAX Omega Ratio Rank: 58
VTSAX Calmar Ratio Rank: 70
VTSAX Martin Ratio Rank: 80

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.

NAEFX vs. VTSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for New Alternatives Fund Investor Class (NAEFX) and Vanguard Total Stock Market Index Fund Admiral Shares (VTSAX). 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.

	NAEFX	VTSAX	Difference
Sharpe ratio: Return per unit of total volatility	1.96	2.14	-0.18
Sortino ratio: Return per unit of downside risk	2.66	2.90	-0.24
Omega ratio: Gain probability vs. loss probability	1.34	1.38	-0.05
Calmar ratio: Return relative to maximum drawdown	3.93	3.07	+0.85
Martin ratio: Return relative to average drawdown	11.43	13.77	-2.34

NAEFX vs. VTSAX - Sharpe Ratio Comparison

The current NAEFX Sharpe Ratio is 1.96, which is comparable to the VTSAX Sharpe Ratio of 2.14. The chart below compares the historical Sharpe Ratios of NAEFX and VTSAX, 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

NAEFX vs. VTSAX - Drawdown Comparison

The maximum NAEFX drawdown since its inception was -42.74%, smaller than the maximum VTSAX drawdown of -55.33%. Use the drawdown chart below to compare losses from any high point for NAEFX and VTSAX.

Drawdown Indicators

	NAEFX	VTSAX	Difference
Max Drawdown Largest peak-to-trough decline	-42.74%	-55.33%	+12.59%
Max Drawdown (1Y) Largest decline over 1 year	-7.54%	-8.92%	+1.38%
Max Drawdown (3Y) Largest decline over 3 years	-24.39%	-19.36%	-5.03%
Max Drawdown (5Y) Largest decline over 5 years	-38.35%	-25.36%	-12.99%
Max Drawdown (10Y) Largest decline over 10 years	-42.74%	-34.97%	-7.77%
Current Drawdown Current decline from peak	-1.26%	-1.13%	-0.13%
Average Drawdown Average peak-to-trough decline	-13.39%	-8.99%	-4.40%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.58%	1.99%	+0.59%

Volatility

NAEFX vs. VTSAX - Volatility Comparison

New Alternatives Fund Investor Class (NAEFX) and Vanguard Total Stock Market Index Fund Admiral Shares (VTSAX) have volatilities of 4.93% and 4.88%, 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

	NAEFX	VTSAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.93%	4.88%	+0.05%
Volatility (6M) Calculated over the trailing 6-month period	12.47%	10.11%	+2.36%
Volatility (1Y) Calculated over the trailing 1-year period	15.11%	12.80%	+2.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.88%	17.45%	+0.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.05%	18.45%	-0.40%

NAEFX vs. VTSAX - Expense Ratio Comparison

NAEFX has a 1.28% expense ratio, which is higher than VTSAX's 0.04% expense ratio.

Dividends

NAEFX vs. VTSAX - Dividend Comparison

NAEFX's dividend yield for the trailing twelve months is around 0.79%, less than VTSAX's 1.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NAEFX New Alternatives Fund Investor Class	0.79%	0.93%	1.75%	4.14%	4.37%	4.90%	4.88%	5.35%	6.39%	3.98%	3.48%	0.00%
VTSAX Vanguard Total Stock Market Index Fund Admiral Shares	1.01%	1.11%	1.26%	1.42%	1.65%	1.20%	1.41%	1.76%	2.03%	1.71%	1.92%	1.98%

Frequently Asked Questions

Can I hold both NAEFX and VTSAX in my portfolio?

NAEFX and VTSAX have a correlation of 0.64, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NAEFX or VTSAX?

NAEFX has higher volatility (4.93%) compared to VTSAX (4.88%). In terms of maximum drawdown, NAEFX dropped -42.74% vs VTSAX's -55.33%.

Which has better risk-adjusted returns?

VTSAX currently has the higher Sharpe Ratio (2.14 vs 1.96), 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.