TAC vs. NRGV

Last updated Jun 3, 2026

TAC (TransAlta Corp) and NRGV (Energy Vault Holdings, Inc.) are both stocks. Both are in the Utilities sector — TAC in Utilities - Independent Power Producers, NRGV in Utilities - Renewable. Over the past 3 years, TAC returned 15.33%/yr vs 34.84%/yr for NRGV. At a 0.24 correlation, their price movements are largely independent.

Performance

TAC vs. NRGV - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TransAlta Corp (TAC) and Energy Vault Holdings, Inc. (NRGV). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TAC achieves a 14.28% return, which is significantly lower than NRGV's 27.11% return.

TAC

• 1D: 1.27%
• 1M: 15.31%
• YTD: 14.28%
• 6M: 2.73%
• 1Y: 47.07%
• 3Y*: 15.33%
• 5Y*: 10.58%
• 10Y*: 13.17%

NRGV

• 1D: 9.53%
• 1M: 33.79%
• YTD: 27.11%
• 6M: 75.45%
• 1Y: 611.34%
• 3Y*: 34.84%
• 5Y*: —
• 10Y*: —

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

TAC vs. NRGV - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
TAC TransAlta Corp	14.28%	-9.24%	73.96%	-5.50%	-13.19%
NRGV Energy Vault Holdings, Inc.	27.11%	102.19%	-2.15%	-25.32%	-66.77%

Correlation

The correlation between TAC and NRGV is 0.23, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.23
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (All Time) Calculated using the full available price history since Feb 15, 2022	0.24

Fundamentals

Market Cap TAC : $4.26B NRGV : $1.01B
EPS TAC : -$0.57 NRGV : -$0.70
PS Ratio TAC : 1.95 NRGV : 4.46
PB Ratio TAC : 9.14 NRGV : 33.07
Total Revenue (TTM) TAC : $2.21B NRGV : $217.02M
Gross Profit (TTM) TAC : $889.52M NRGV : $47.90M
EBITDA (TTM) TAC : $511.31M NRGV : -$75.37M

Return for Risk

TAC vs. NRGV — Risk / Return Rank

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

TAC

TAC Risk / Return Rank: 69
TAC Sharpe Ratio Rank: 75
TAC Sortino Ratio Rank: 70
TAC Omega Ratio Rank: 70
TAC Calmar Ratio Rank: 68
TAC Martin Ratio Rank: 63

NRGV

NRGV Risk / Return Rank: 96
NRGV Sharpe Ratio Rank: 99
NRGV Sortino Ratio Rank: 94
NRGV Omega Ratio Rank: 92
NRGV Calmar Ratio Rank: 98
NRGV Martin Ratio Rank: 97

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.

TAC vs. NRGV - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TransAlta Corp (TAC) and Energy Vault Holdings, Inc. (NRGV). 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.

	TAC	NRGV	Difference
Sharpe ratio Return per unit of total volatility	1.19	5.87	-4.68
Sortino ratio Return per unit of downside risk	1.76	3.88	-2.12
Omega ratio Gain probability vs. loss probability	1.23	1.50	-0.27
Calmar ratio Return relative to maximum drawdown	1.48	11.97	-10.49
Martin ratio Return relative to average drawdown	2.56	25.01	-22.45
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TAC vs. NRGV - Sharpe Ratio Comparison

The current TAC Sharpe Ratio is 1.19, which is lower than the NRGV Sharpe Ratio of 5.87. The chart below compares the historical Sharpe Ratios of TAC and NRGV, 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

	TAC	NRGV	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.19	5.87	-4.68
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.31	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.37	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.14	-0.09	+0.23

Drawdowns

TAC vs. NRGV - Drawdown Comparison

The maximum TAC drawdown since its inception was -88.12%, smaller than the maximum NRGV drawdown of -97.09%. Use the drawdown chart below to compare losses from any high point for TAC and NRGV.

Drawdown Indicators

	TAC	NRGV	Difference
Max Drawdown Largest peak-to-trough decline	-88.12%	-97.09%	+8.97%
Max Drawdown (1Y) Largest decline over 1 year	-33.10%	-50.91%	+17.81%
Max Drawdown (3Y) Largest decline over 3 years	-43.26%	-81.48%	+38.22%
Max Drawdown (5Y) Largest decline over 5 years	-46.55%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-55.11%	—	—
Current Drawdown Current decline from peak	-18.49%	-72.92%	+54.43%
Average Drawdown Average peak-to-trough decline	-40.59%	-82.81%	+42.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	19.17%	24.36%	-5.19%

Volatility

TAC vs. NRGV - Volatility Comparison

The current volatility for TransAlta Corp (TAC) is 8.08%, while Energy Vault Holdings, Inc. (NRGV) has a volatility of 36.08%. This indicates that TAC experiences smaller price fluctuations and is considered to be less risky than NRGV based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TAC	NRGV	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.08%	36.08%	-28.00%
Volatility (6M) Calculated over the trailing 6-month period	27.47%	73.21%	-45.74%
Volatility (1Y) Calculated over the trailing 1-year period	39.66%	105.09%	-65.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.50%	113.35%	-78.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.39%	113.35%	-77.96%

Dividends

TAC vs. NRGV - Dividend Comparison

TAC's dividend yield for the trailing twelve months is around 1.34%, while NRGV has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NRGV Energy Vault Holdings, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TAC TransAlta Corp	1.34%	1.44%	1.24%	2.13%	1.76%	1.38%	1.69%	1.68%	3.20%	2.69%	2.74%	20.34%

Financials

Frequently Asked Questions

Can I hold both TAC and NRGV in my portfolio?

TAC and NRGV have a correlation of 0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TAC or NRGV?

NRGV has higher volatility (36.08%) compared to TAC (8.08%). In terms of maximum drawdown, TAC dropped -88.12% vs NRGV's -97.09%.

Which has better risk-adjusted returns?

NRGV currently has the higher Sharpe Ratio (5.87 vs 1.19), 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.