AY vs. SPY

Last updated Jun 4, 2026

AY (Atlantica Sustainable Infrastructure plc) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. At a 0.34 correlation, their price movements are largely independent.

Performance

AY vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Atlantica Sustainable Infrastructure plc (AY) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

AY

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

SPY

• 1D: -0.70%
• 1M: 5.05%
• YTD: 10.91%
• 6M: 10.91%
• 1Y: 27.98%
• 3Y*: 22.35%
• 5Y*: 13.83%
• 10Y*: 15.49%

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

AY vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AY Atlantica Sustainable Infrastructure plc	0.00%	0.00%	10.22%	-10.32%	-23.47%	-1.43%	52.41%	44.34%	-1.12%	15.14%
SPY State Street SPDR S&P 500 ETF	10.91%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	21.71%

Correlation

The correlation between AY and SPY is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (3Y) Calculated over the trailing 3-year period	0.15
Correlation (5Y) Calculated over the trailing 5-year period	0.33
Correlation (10Y) Calculated over the trailing 10-year period	0.33
Correlation (All Time) Calculated using the full available price history since Jun 16, 2014	0.34

The correlation between AY and SPY shifts across timeframes, from 0.15 (3 years) to 0.34 (all time), reflecting how their relationship changes across market environments.

Return for Risk

AY vs. SPY — Risk / Return Rank

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

SPY

SPY Risk / Return Rank: 70
SPY Sharpe Ratio Rank: 71
SPY Sortino Ratio Rank: 69
SPY Omega Ratio Rank: 70
SPY Calmar Ratio Rank: 62
SPY Martin Ratio Rank: 75

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.

AY vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Atlantica Sustainable Infrastructure plc (AY) and State Street SPDR S&P 500 ETF (SPY). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	AY	SPY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.38	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.82	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.87	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.59	—

Drawdowns

Drawdown Indicators

	AY	SPY	Difference
Max Drawdown Largest peak-to-trough decline	—	-55.19%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-8.88%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-18.76%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.72%	—
Current Drawdown Current decline from peak	—	-0.70%	—
Average Drawdown Average peak-to-trough decline	—	-9.05%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.91%	—

Volatility

Volatility by Period

	AY	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	2.84%	—
Volatility (6M) Calculated over the trailing 6-month period	—	8.90%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	11.83%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	17.05%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	17.94%	—

Dividends

AY vs. SPY - Dividend Comparison

AY has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 0.98%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AY Atlantica Sustainable Infrastructure plc	0.00%	0.00%	7.08%	8.28%	6.83%	4.80%	4.37%	5.95%	6.79%	4.95%	2.34%	7.41%
SPY State Street SPDR S&P 500 ETF	0.98%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both AY and SPY in my portfolio?

AY and SPY have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.