TAC vs. VST
TAC (TransAlta Corp) and VST (Vistra Corp.) are both stocks. Both operate in the Utilities - Independent Power Producers industry within the Utilities sector. Over the past 5 years, TAC returned 8.54%/yr vs 59.54%/yr for VST. At a 0.29 correlation, their price movements are largely independent.
Performance
TAC vs. VST - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, TAC achieves a 10.37% return, which is significantly higher than VST's 3.96% return.
TAC
- 1D
- 0.80%
- 1M
- 2.43%
- YTD
- 10.37%
- 6M
- 11.97%
- 1Y
- 27.94%
- 3Y*
- 16.36%
- 5Y*
- 8.54%
- 10Y*
- 12.88%
VST
- 1D
- 2.29%
- 1M
- 7.18%
- YTD
- 3.96%
- 6M
- 3.81%
- 1Y
- -9.16%
- 3Y*
- 90.08%
- 5Y*
- 59.54%
- 10Y*
- —
TAC vs. VST - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TAC TransAlta Corp | 10.37% | -9.24% | 73.96% | -5.50% | -18.03% | 48.90% | 8.06% | 77.05% | -29.03% | 11.23% |
VST Vistra Corp. | 3.96% | 17.66% | 261.52% | 70.73% | 5.08% | 19.57% | -11.87% | 2.46% | 24.95% | 18.19% |
Correlation
The correlation between TAC and VST is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.42 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.33 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.35 |
Correlation (All Time) Calculated using the full available price history since Oct 4, 2016 | 0.29 |
The correlation between TAC and VST shifts across timeframes, from 0.29 (all time) to 0.42 (1 year), reflecting how their relationship changes across market environments.
Fundamentals
TAC:
-CA$0.57
VST:
$8.60
TAC:
2.66
VST:
2.48
TAC:
CA$2.21B
VST:
$17.20B
TAC:
CA$889.52M
VST:
$1.12B
TAC:
CA$511.31M
VST:
$4.34B
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
TAC vs. VST — Risk / Return Rank
TAC
VST
TAC vs. VST - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for TransAlta Corp (TAC) and Vistra Corp. (VST). 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.
| TAC | VST | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.89 | ||
| Sortino ratioReturn per unit of downside risk | +1.10 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 1.01 | +0.15 |
| Calmar ratioReturn relative to maximum drawdown | 0.85 | -0.24 | +1.09 |
| Martin ratioReturn relative to average drawdown | 1.41 | -0.44 | +1.84 |
Loading charts...
Drawdowns
TAC vs. VST - Drawdown Comparison
The maximum TAC drawdown since its inception was -88.12%, which is greater than VST's maximum drawdown of -53.32%. Use the drawdown chart below to compare losses from any high point for TAC and VST.
Loading charts...
Drawdown Indicators
| TAC | VST | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -88.12% | -53.32% | -34.80% |
Max Drawdown (1Y)Largest decline over 1 year | -33.10% | -38.01% | +4.91% |
Max Drawdown (3Y)Largest decline over 3 years | -43.26% | -48.80% | +5.54% |
Max Drawdown (5Y)Largest decline over 5 years | -46.55% | -48.80% | +2.25% |
Max Drawdown (10Y)Largest decline over 10 years | -55.11% | — | — |
Current DrawdownCurrent decline from peak | -21.28% | -22.93% | +1.65% |
Average DrawdownAverage peak-to-trough decline | -40.55% | -13.75% | -26.80% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 19.92% | 21.06% | -1.14% |
Volatility
TAC vs. VST - Volatility Comparison
TransAlta Corp (TAC) has a higher volatility of 15.58% compared to Vistra Corp. (VST) at 14.21%. This indicates that TAC's price experiences larger fluctuations and is considered to be riskier than VST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| TAC | VST | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 15.58% | 14.21% | +1.37% |
Volatility (6M)Calculated over the trailing 6-month period | 29.50% | 36.96% | -7.46% |
Volatility (1Y)Calculated over the trailing 1-year period | 40.20% | 48.94% | -8.74% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 35.00% | 48.02% | -13.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 35.57% | 42.22% | -6.65% |
Dividends
TAC vs. VST - Dividend Comparison
TAC's dividend yield for the trailing twelve months is around 1.39%, more than VST's 0.54% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
TAC TransAlta Corp | 1.39% | 1.44% | 1.24% | 2.13% | 1.76% | 1.38% | 1.69% | 1.68% | 3.20% | 2.69% | 2.74% | 20.34% |
VST Vistra Corp. | 0.54% | 0.56% | 0.63% | 2.13% | 3.12% | 2.64% | 2.75% | 2.17% | 0.00% | 0.00% | 14.97% | 0.00% |
Financials
TAC vs. VST - Financials Comparison
This section allows you to compare key financial metrics between TransAlta Corp and Vistra 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
TAC vs. VST - Profitability Comparison
TAC - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 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%.
VST - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Vistra Corp. reported a gross profit of 0.00 and revenue of 5.64B. Therefore, the gross margin over that period was 0.0%.
TAC - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, TransAlta Corp reported an operating income of 24.06M and revenue of 566.46M, resulting in an operating margin of 4.3%.
VST - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Vistra Corp. reported an operating income of 1.50B and revenue of 5.64B, resulting in an operating margin of 26.6%.
TAC - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, TransAlta Corp reported a net income of 13.03M and revenue of 566.46M, resulting in a net margin of 2.3%.
VST - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Vistra Corp. reported a net income of 980.00M and revenue of 5.64B, resulting in a net margin of 17.4%.
Frequently Asked Questions
TAC and VST have a correlation of 0.42, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TAC has higher volatility (15.58%) compared to VST (14.21%). In terms of maximum drawdown, TAC dropped -88.12% vs VST's -53.32%.
TAC currently has the higher Sharpe Ratio (0.70 vs -0.19), 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.
Find the right allocation for TAC and VST
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer