TAC vs. CIG

Last updated Apr 1, 2026

Compare and contrast key facts about TransAlta Corp (TAC) and Companhia Energética de Minas Gerais (CIG).

Performance

TAC vs. CIG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TransAlta Corp (TAC) and Companhia Energética de Minas Gerais (CIG). The values are adjusted to include any dividend payments, if applicable.

TAC vs. CIG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TAC TransAlta Corp	4.02%	-9.24%	73.96%	-5.50%	-18.03%	48.90%	8.06%	77.05%	-29.03%	11.23%
CIG Companhia Energética de Minas Gerais	21.73%	28.04%	9.38%	20.62%	60.40%	-6.09%	-7.92%	-1.14%	84.56%	-8.17%

Fundamentals

Market Cap TAC : $3.89B CIG : $6.84B
EPS TAC : -$0.46 CIG : $1.72
PS Ratio TAC : 1.64 CIG : 0.16
PB Ratio TAC : 8.52 CIG : 0.24
Total Revenue (TTM) TAC : $2.40B CIG : $42.79B
Gross Profit (TTM) TAC : $1.08B CIG : $6.14B
EBITDA (TTM) TAC : $470.07M CIG : $6.94B

Returns By Period

In the year-to-date period, TAC achieves a 4.02% return, which is significantly lower than CIG's 21.73% return. Over the past 10 years, TAC has underperformed CIG with an annualized return of 13.34%, while CIG has yielded a comparatively higher 18.13% annualized return.

TAC

• 1D: 3.07%
• 1M: -4.66%
• YTD: 4.02%
• 6M: -3.51%
• 1Y: 42.29%
• 3Y*: 16.55%
• 5Y*: 8.21%
• 10Y*: 13.34%

CIG

• 1D: 2.58%
• 1M: 2.72%
• YTD: 21.73%
• 6M: 21.81%
• 1Y: 53.88%
• 3Y*: 22.74%
• 5Y*: 32.16%
• 10Y*: 18.13%

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

Return for Risk

TAC vs. CIG — 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: 69
TAC Omega Ratio Rank: 69
TAC Calmar Ratio Rank: 67
TAC Martin Ratio Rank: 64

CIG

CIG Risk / Return Rank: 87
CIG Sharpe Ratio Rank: 89
CIG Sortino Ratio Rank: 85
CIG Omega Ratio Rank: 82
CIG Calmar Ratio Rank: 90
CIG Martin Ratio Rank: 89

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. CIG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TransAlta Corp (TAC) and Companhia Energética de Minas Gerais (CIG). 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	CIG	Difference
Sharpe ratio Return per unit of total volatility	1.02	1.79	-0.77
Sortino ratio Return per unit of downside risk	1.54	2.39	-0.85
Omega ratio Gain probability vs. loss probability	1.21	1.29	-0.09
Calmar ratio Return relative to maximum drawdown	1.22	3.73	-2.51
Martin ratio Return relative to average drawdown	2.49	9.63	-7.13
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. CIG - Sharpe Ratio Comparison

The current TAC Sharpe Ratio is 1.02, which is lower than the CIG Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of TAC and CIG, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	TAC	CIG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.02	1.79	-0.77
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.24	0.85	-0.61
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.38	0.38	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	0.15	-0.02

Correlation

The correlation between TAC and CIG is 0.23, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

TAC vs. CIG - Dividend Comparison

TAC's dividend yield for the trailing twelve months is around 1.44%, less than CIG's 10.48% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TAC TransAlta Corp	1.44%	1.44%	1.24%	2.13%	1.76%	1.38%	1.69%	1.68%	3.20%	2.69%	2.74%	20.34%
CIG Companhia Energética de Minas Gerais	10.48%	12.02%	11.10%	5.50%	13.28%	10.94%	3.94%	3.35%	4.20%	1.98%	7.39%	7.78%

Drawdowns

TAC vs. CIG - Drawdown Comparison

The maximum TAC drawdown since its inception was -88.12%, roughly equal to the maximum CIG drawdown of -88.84%. Use the drawdown chart below to compare losses from any high point for TAC and CIG.

Drawdown Indicators

	TAC	CIG	Difference
Max Drawdown Largest peak-to-trough decline	-88.12%	-88.84%	+0.72%
Max Drawdown (1Y) Largest decline over 1 year	-33.10%	-14.04%	-19.06%
Max Drawdown (5Y) Largest decline over 5 years	-46.55%	-26.00%	-20.55%
Max Drawdown (10Y) Largest decline over 10 years	-55.11%	-65.73%	+10.62%
Current Drawdown Current decline from peak	-25.81%	0.00%	-25.81%
Average Drawdown Average peak-to-trough decline	-40.70%	-41.83%	+1.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	16.25%	5.45%	+10.80%

Volatility

TAC vs. CIG - Volatility Comparison

TransAlta Corp (TAC) has a higher volatility of 11.61% compared to Companhia Energética de Minas Gerais (CIG) at 10.54%. This indicates that TAC's price experiences larger fluctuations and is considered to be riskier than CIG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TAC	CIG	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.61%	10.54%	+1.07%
Volatility (6M) Calculated over the trailing 6-month period	31.81%	22.72%	+9.09%
Volatility (1Y) Calculated over the trailing 1-year period	41.75%	30.27%	+11.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.09%	38.08%	-3.99%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.47%	47.54%	-12.07%

Financials

TAC vs. CIG - Profitability Comparison

The chart below illustrates the profitability comparison between TransAlta Corp and Companhia Energética de Minas Gerais over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

TAC - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, TransAlta Corp reported a gross profit of 137.89M and revenue of 598.51M. Therefore, the gross margin over that period was 23.0%.

CIG - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Companhia Energética de Minas Gerais reported a gross profit of 1.66B and revenue of 11.68B. Therefore, the gross margin over that period was 14.2%.

TAC - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, TransAlta Corp reported an operating income of -89.93M and revenue of 598.51M, resulting in an operating margin of -15.0%.

CIG - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Companhia Energética de Minas Gerais reported an operating income of 1.31B and revenue of 11.68B, resulting in an operating margin of 11.3%.

TAC - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, TransAlta Corp reported a net income of -35.97M and revenue of 598.51M, resulting in a net margin of -6.0%.

CIG - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Companhia Energética de Minas Gerais reported a net income of 1.90B and revenue of 11.68B, resulting in a net margin of 16.3%.