PNW vs. ^GSPC

Last updated Jun 3, 2026

PNW (Pinnacle West Capital Corporation) is a stock, while ^GSPC (S&P 500 Index) is an index. Over the past 10 years, PNW returned 6.82%/yr vs 13.75%/yr for ^GSPC. At a 0.33 correlation, their price movements are largely independent.

Performance

PNW vs. ^GSPC - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pinnacle West Capital Corporation (PNW) and S&P 500 Index (^GSPC). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PNW achieves a 13.50% return, which is significantly higher than ^GSPC's 11.16% return. Over the past 10 years, PNW has underperformed ^GSPC with an annualized return of 6.82%, while ^GSPC has yielded a comparatively higher 13.75% annualized return.

PNW

• 1D: 1.37%
• 1M: -3.71%
• YTD: 13.50%
• 6M: 13.71%
• 1Y: 13.10%
• 3Y*: 13.17%
• 5Y*: 7.19%
• 10Y*: 6.82%

^GSPC

• 1D: 0.13%
• 1M: 5.25%
• YTD: 11.16%
• 6M: 11.43%
• 1Y: 28.20%
• 3Y*: 21.12%
• 5Y*: 12.66%
• 10Y*: 13.75%

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

PNW vs. ^GSPC - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PNW Pinnacle West Capital Corporation	13.50%	8.92%	23.46%	-1.18%	13.01%	-7.78%	-7.68%	9.06%	3.58%	12.67%
^GSPC S&P 500 Index	11.16%	16.39%	23.31%	24.23%	-19.44%	26.89%	16.26%	28.88%	-6.24%	19.42%

Correlation

The correlation between PNW and ^GSPC is -0.06, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.06
Correlation (3Y) Calculated over the trailing 3-year period	0.08
Correlation (5Y) Calculated over the trailing 5-year period	0.20
Correlation (10Y) Calculated over the trailing 10-year period	0.24
Correlation (All Time) Calculated using the full available price history since Jul 20, 1984	0.33

The correlation between PNW and ^GSPC shifts across timeframes, from -0.06 (1 year) to 0.33 (all time), reflecting how their relationship changes across market environments.

Return for Risk

PNW vs. ^GSPC — Risk / Return Rank

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

PNW

PNW Risk / Return Rank: 64
PNW Sharpe Ratio Rank: 67
PNW Sortino Ratio Rank: 60
PNW Omega Ratio Rank: 55
PNW Calmar Ratio Rank: 68
PNW Martin Ratio Rank: 69

^GSPC

^GSPC Risk / Return Rank: 79
^GSPC Sharpe Ratio Rank: 76
^GSPC Sortino Ratio Rank: 76
^GSPC Omega Ratio Rank: 77
^GSPC Calmar Ratio Rank: 79
^GSPC Martin Ratio Rank: 88

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.

PNW vs. ^GSPC - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pinnacle West Capital Corporation (PNW) and S&P 500 Index (^GSPC). 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.

	PNW	^GSPC	Difference
Sharpe ratio Return per unit of total volatility	0.83	2.39	-1.56
Sortino ratio Return per unit of downside risk	1.28	3.25	-1.97
Omega ratio Gain probability vs. loss probability	1.14	1.43	-0.29
Calmar ratio Return relative to maximum drawdown	1.50	3.16	-1.66
Martin ratio Return relative to average drawdown	3.60	14.61	-11.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PNW vs. ^GSPC - Sharpe Ratio Comparison

The current PNW Sharpe Ratio is 0.83, which is lower than the ^GSPC Sharpe Ratio of 2.39. The chart below compares the historical Sharpe Ratios of PNW and ^GSPC, 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

	PNW	^GSPC	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.83	2.39	-1.56
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	0.75	-0.40
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.30	0.76	-0.46
Sharpe Ratio (All Time) Calculated using the full available price history	0.30	0.47	-0.17

Drawdowns

PNW vs. ^GSPC - Drawdown Comparison

The maximum PNW drawdown since its inception was -79.18%, which is greater than ^GSPC's maximum drawdown of -56.78%. Use the drawdown chart below to compare losses from any high point for PNW and ^GSPC.

Drawdown Indicators

	PNW	^GSPC	Difference
Max Drawdown Largest peak-to-trough decline	-79.18%	-56.78%	-22.40%
Max Drawdown (1Y) Largest decline over 1 year	-8.43%	-9.10%	+0.67%
Max Drawdown (3Y) Largest decline over 3 years	-19.52%	-18.90%	-0.62%
Max Drawdown (5Y) Largest decline over 5 years	-28.14%	-25.43%	-2.71%
Max Drawdown (10Y) Largest decline over 10 years	-39.28%	-33.92%	-5.36%
Current Drawdown Current decline from peak	-4.55%	0.00%	-4.55%
Average Drawdown Average peak-to-trough decline	-14.61%	-10.72%	-3.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.51%	1.97%	+1.54%

Volatility

PNW vs. ^GSPC - Volatility Comparison

Pinnacle West Capital Corporation (PNW) has a higher volatility of 4.96% compared to S&P 500 Index (^GSPC) at 2.84%. This indicates that PNW's price experiences larger fluctuations and is considered to be riskier than ^GSPC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PNW	^GSPC	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.96%	2.84%	+2.12%
Volatility (6M) Calculated over the trailing 6-month period	11.86%	8.98%	+2.88%
Volatility (1Y) Calculated over the trailing 1-year period	15.92%	11.87%	+4.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.36%	16.90%	+3.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.62%	18.07%	+4.55%

Frequently Asked Questions

Can I hold both PNW and ^GSPC in my portfolio?

PNW and ^GSPC have a correlation of -0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PNW or ^GSPC?

PNW has higher volatility (4.96%) compared to ^GSPC (2.84%). In terms of maximum drawdown, PNW dropped -79.18% vs ^GSPC's -56.78%.

Which has better risk-adjusted returns?

^GSPC currently has the higher Sharpe Ratio (2.39 vs 0.83), 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.