CIG vs. TAC
CIG (Companhia Energética de Minas Gerais) and TAC (TransAlta Corp) are both stocks. Both are in the Utilities sector — CIG in Utilities - Diversified, TAC in Utilities - Independent Power Producers. Over the past 10 years, CIG returned 14.81%/yr vs 12.71%/yr for TAC. Their 0.23 correlation means their historical movements had little consistent relationship.
Performance
CIG vs. TAC - Performance Comparison
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Returns By Period
In the year-to-date period, CIG achieves a 16.35% return, which is significantly higher than TAC's -0.39% return. Over the past 10 years, CIG has outperformed TAC with an annualized return of 14.81%, while TAC has yielded a comparatively lower 12.71% annualized return.
CIG
- 1D
- 0.92%
- 1M
- 4.78%
- 6M
- 8.23%
- YTD
- 16.35%
- 1Y
- 34.97%
- 3Y*
- 14.59%
- 5Y*
- 28.96%
- 10Y*
- 14.81%
- ALL TIME*
- 7.47%
TAC
- 1D
- -2.80%
- 1M
- -7.20%
- 6M
- -1.48%
- YTD
- -0.39%
- 1Y
- 2.50%
- 3Y*
- 9.26%
- 5Y*
- 5.55%
- 10Y*
- 12.71%
- ALL TIME*
- 3.60%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $11.82M | $12.68M | $14.13M | |
| $21.79M | $21.28M | $22.20M |
CIG vs. TAC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
CIG Companhia Energética de Minas Gerais | 16.35% | 28.04% | 9.38% | 20.62% | 60.40% | -6.09% | -7.92% | -1.14% | 84.56% | -8.17% |
TAC TransAlta Corp | -0.39% | -9.24% | 73.96% | -5.50% | -18.03% | 48.90% | 8.06% | 77.05% | -29.03% | 11.23% |
Correlation
The correlation between CIG and TAC is 0.22, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.22 |
Correlation (3Y) Balances recent behavior with more history. | 0.16 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.17 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.21 |
Correlation (All Time) Calculated using the full available price history since Jul 31, 2001 | 0.23 |
Fundamentals
CIG:
$6.26B
TAC:
$3.72B
CIG:
R$1.69
TAC:
-CA$0.57
CIG:
0.73
TAC:
2.39
CIG:
1.11
TAC:
11.16
CIG:
R$43.35B
TAC:
CA$2.21B
CIG:
R$6.06B
TAC:
CA$889.52M
CIG:
R$6.81B
TAC:
CA$511.31M
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Return for Risk
CIG vs. TAC — Risk / Return Rank
CIG
TAC
CIG vs. TAC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Companhia Energética de Minas Gerais (CIG) and TransAlta Corp (TAC). 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.
| CIG | TAC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.06 | ||
| Sortino ratioReturn per unit of downside risk | +1.30 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.06 | +0.14 |
| Calmar ratioReturn relative to maximum drawdown | 1.52 | 0.16 | +1.36 |
| Martin ratioReturn relative to average drawdown | 3.39 | 0.25 | +3.15 |
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Drawdowns
CIG vs. TAC - Drawdown Comparison
The maximum CIG drawdown since its inception was -88.84%, roughly equal to the maximum TAC drawdown of -88.12%. Use the drawdown chart below to compare losses from any high point for CIG and TAC.
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Drawdown Indicators
| CIG | TAC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -88.84% | -88.12% | -0.72% |
Max Drawdown (1Y)Largest decline over 1 year | -23.67% | -33.10% | +9.43% |
Max Drawdown (3Y)Largest decline over 3 years | -23.67% | -43.26% | +19.59% |
Max Drawdown (5Y)Largest decline over 5 years | -26.00% | -46.55% | +20.55% |
Max Drawdown (10Y)Largest decline over 10 years | -65.73% | -55.11% | -10.62% |
Current DrawdownCurrent decline from peak | -16.32% | -28.95% | +12.63% |
Average DrawdownAverage peak-to-trough decline | -41.51% | -40.47% | -1.04% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 10.55% | 21.26% | -10.71% |
Volatility
CIG vs. TAC - Volatility Comparison
The current volatility for Companhia Energética de Minas Gerais (CIG) is 8.63%, while TransAlta Corp (TAC) has a volatility of 11.33%. This indicates that CIG experiences smaller price fluctuations and is considered to be less risky than TAC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CIG | TAC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 8.63% | 11.33% | -2.70% |
Volatility (6M)Calculated over the trailing 6-month period | 21.72% | 29.45% | -7.73% |
Volatility (1Y)Calculated over the trailing 1-year period | 30.26% | 40.56% | -10.30% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 37.42% | 35.27% | +2.15% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 46.01% | 35.53% | +10.48% |
Dividends
CIG vs. TAC - Dividend Comparison
CIG's dividend yield for the trailing twelve months is around 11.08%, more than TAC's 1.54% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CIG Companhia Energética de Minas Gerais | 11.08% | 12.02% | 11.10% | 5.50% | 13.28% | 10.94% | 3.94% | 3.35% | 4.20% | 1.98% | 7.39% | 7.78% |
TAC TransAlta Corp | 1.54% | 1.44% | 1.24% | 2.13% | 1.76% | 1.38% | 1.69% | 1.68% | 3.20% | 2.69% | 2.74% | 20.34% |
Financials
CIG vs. TAC - Financials Comparison
This section allows you to compare key financial metrics between Companhia Energética de Minas Gerais and TransAlta Corp. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
CIG vs. TAC - Profitability Comparison
CIG - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Companhia Energética de Minas Gerais reported a gross profit of 1.62B and revenue of 10.27B. Therefore, the gross margin over that period was 15.8%.
TAC - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, TransAlta Corp reported a gross profit of 243.63M and revenue of 566.46M. Therefore, the gross margin over that period was 43.0%.
CIG - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Companhia Energética de Minas Gerais reported an operating income of 1.31B and revenue of 10.27B, resulting in an operating margin of 12.8%.
TAC - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, TransAlta Corp reported an operating income of 24.06M and revenue of 566.46M, resulting in an operating margin of 4.3%.
CIG - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Companhia Energética de Minas Gerais reported a net income of 960.23M and revenue of 10.27B, resulting in a net margin of 9.4%.
TAC - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, TransAlta Corp reported a net income of 13.03M and revenue of 566.46M, resulting in a net margin of 2.3%.
Frequently Asked Questions
CIG and TAC have a correlation of 0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TAC has higher volatility (11.33%) compared to CIG (8.63%). In terms of maximum drawdown, CIG dropped -88.84% vs TAC's -88.12%.
CIG currently has the higher Sharpe Ratio (1.19 vs 0.13), 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.
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