TAC vs. VST

Last updated Apr 1, 2026

Compare and contrast key facts about TransAlta Corp (TAC) and Vistra Corp. (VST).

Performance

TAC vs. VST - Performance Comparison

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

TAC vs. VST - 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%
VST Vistra Corp.	-6.69%	17.66%	261.52%	70.73%	5.08%	19.57%	-11.87%	2.46%	24.95%	18.19%

Fundamentals

EPS TAC : -$0.46 VST : $4.17
PS Ratio TAC : 1.64 VST : 1.92
Total Revenue (TTM) TAC : $2.40B VST : $17.74B
Gross Profit (TTM) TAC : $1.08B VST : $3.96B
EBITDA (TTM) TAC : $470.07M VST : -$2.59B

Returns By Period

In the year-to-date period, TAC achieves a 4.02% return, which is significantly higher than VST's -6.69% 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%

VST

• 1D: 1.89%
• 1M: -13.43%
• YTD: -6.69%
• 6M: -23.06%
• 1Y: 28.66%
• 3Y*: 86.61%
• 5Y*: 56.44%
• 10Y*: —

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

Return for Risk

TAC vs. VST — 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

VST

VST Risk / Return Rank: 59
VST Sharpe Ratio Rank: 61
VST Sortino Ratio Rank: 58
VST Omega Ratio Rank: 57
VST Calmar Ratio Rank: 60
VST Martin Ratio Rank: 59

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. 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.

	TAC	VST	Difference
Sharpe ratio Return per unit of total volatility	1.02	0.52	+0.50
Sortino ratio Return per unit of downside risk	1.54	1.04	+0.50
Omega ratio Gain probability vs. loss probability	1.21	1.14	+0.07
Calmar ratio Return relative to maximum drawdown	1.22	0.78	+0.44
Martin ratio Return relative to average drawdown	2.49	1.65	+0.84
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. VST - Sharpe Ratio Comparison

The current TAC Sharpe Ratio is 1.02, which is higher than the VST Sharpe Ratio of 0.52. The chart below compares the historical Sharpe Ratios of TAC and VST, 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	VST	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.02	0.52	+0.50
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.24	1.20	-0.96
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.38	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	0.73	-0.61

Correlation

The correlation between TAC and VST is 0.29, 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. VST - Dividend Comparison

TAC's dividend yield for the trailing twelve months is around 1.44%, more than VST's 0.60% 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%
VST Vistra Corp.	0.60%	0.56%	0.63%	2.13%	3.12%	2.64%	2.75%	2.17%	0.00%	0.00%	14.97%	0.00%

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.

Drawdown Indicators

	TAC	VST	Difference
Max Drawdown Largest peak-to-trough decline	-88.12%	-53.32%	-34.80%
Max Drawdown (1Y) Largest decline over 1 year	-33.10%	-34.51%	+1.41%
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 Drawdown Current decline from peak	-25.81%	-30.83%	+5.02%
Average Drawdown Average peak-to-trough decline	-40.70%	-13.39%	-27.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	16.25%	16.29%	-0.04%

Volatility

TAC vs. VST - Volatility Comparison

The current volatility for TransAlta Corp (TAC) is 11.61%, while Vistra Corp. (VST) has a volatility of 18.07%. This indicates that TAC experiences smaller price fluctuations and is considered to be less risky than VST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TAC	VST	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.61%	18.07%	-6.46%
Volatility (6M) Calculated over the trailing 6-month period	31.81%	38.53%	-6.72%
Volatility (1Y) Calculated over the trailing 1-year period	41.75%	55.49%	-13.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.09%	47.36%	-13.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.47%	42.15%	-6.68%

Financials

TAC vs. VST - Profitability Comparison

The chart below illustrates the profitability comparison between TransAlta Corp and Vistra Corp. 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%.

VST - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Vistra Corp. reported a gross profit of 0.00 and revenue of 3.35B. 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 Apr 2026, TransAlta Corp reported an operating income of -89.93M and revenue of 598.51M, resulting in an operating margin of -15.0%.

VST - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Vistra Corp. reported an operating income of -818.00M and revenue of 3.35B, resulting in an operating margin of -24.5%.

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%.

VST - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Vistra Corp. reported a net income of 233.00M and revenue of 3.35B, resulting in a net margin of 7.0%.