SPXX vs. ECAT

Last updated Jun 13, 2026

SPXX (Nuveen S&P 500 Dynamic Overwrite Fund) and ECAT (BlackRock ESG Capital Allocation Term Trust) are both mutual funds - SPXX is a S&P 500 fund actively managed by Nuveen, while ECAT is a Derivative Income fund managed by BlackRock. Over the past 3 years, SPXX returned 13.08%/yr vs 18.39%/yr for ECAT. A 0.66 correlation means they provide meaningful diversification when combined. SPXX charges 0.89%/yr vs 1.38%/yr for ECAT.

Performance

SPXX vs. ECAT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen S&P 500 Dynamic Overwrite Fund (SPXX) and BlackRock ESG Capital Allocation Term Trust (ECAT). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPXX achieves a 2.91% return, which is significantly lower than ECAT's 10.66% return.

SPXX

• 1D: 0.11%
• 1M: 2.13%
• YTD: 2.91%
• 6M: 5.89%
• 1Y: 12.87%
• 3Y*: 13.08%
• 5Y*: 6.90%
• 10Y*: 10.24%

ECAT

• 1D: 2.30%
• 1M: 3.12%
• YTD: 10.66%
• 6M: 10.05%
• 1Y: 19.89%
• 3Y*: 18.39%
• 5Y*: —
• 10Y*: —

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

SPXX vs. ECAT - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
SPXX Nuveen S&P 500 Dynamic Overwrite Fund	2.91%	9.78%	27.10%	0.85%	-6.92%	8.68%
ECAT BlackRock ESG Capital Allocation Term Trust	10.66%	16.64%	19.96%	32.36%	-21.90%	-6.25%

Correlation

The correlation between SPXX and ECAT is 0.61, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.61
Correlation (All Time) Calculated using the full available price history since Sep 28, 2021	0.66

The correlation between SPXX and ECAT has been stable across timeframes, ranging from 0.61 to 0.66 - a consistent structural relationship.

Return for Risk

SPXX vs. ECAT — Risk / Return Rank

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

SPXX

SPXX Risk / Return Rank: 17
SPXX Sharpe Ratio Rank: 18
SPXX Sortino Ratio Rank: 18
SPXX Omega Ratio Rank: 17
SPXX Calmar Ratio Rank: 14
SPXX Martin Ratio Rank: 16

ECAT

ECAT Risk / Return Rank: 32
ECAT Sharpe Ratio Rank: 34
ECAT Sortino Ratio Rank: 34
ECAT Omega Ratio Rank: 33
ECAT Calmar Ratio Rank: 27
ECAT Martin Ratio Rank: 31

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.

SPXX vs. ECAT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen S&P 500 Dynamic Overwrite Fund (SPXX) and BlackRock ESG Capital Allocation Term Trust (ECAT). 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.

	SPXX	ECAT	Difference
Sharpe ratio: Return per unit of total volatility	0.95	1.33	-0.38
Sortino ratio: Return per unit of downside risk	1.40	1.93	-0.53
Omega ratio: Gain probability vs. loss probability	1.17	1.24	-0.07
Calmar ratio: Return relative to maximum drawdown	0.97	1.56	-0.59
Martin ratio: Return relative to average drawdown	3.30	5.79	-2.49

SPXX vs. ECAT - Sharpe Ratio Comparison

The current SPXX Sharpe Ratio is 0.95, which is comparable to the ECAT Sharpe Ratio of 1.33. The chart below compares the historical Sharpe Ratios of SPXX and ECAT, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

SPXX vs. ECAT - Drawdown Comparison

The maximum SPXX drawdown since its inception was -52.39%, which is greater than ECAT's maximum drawdown of -32.23%. Use the drawdown chart below to compare losses from any high point for SPXX and ECAT.

Drawdown Indicators

	SPXX	ECAT	Difference
Max Drawdown Largest peak-to-trough decline	-52.39%	-32.23%	-20.16%
Max Drawdown (1Y) Largest decline over 1 year	-11.86%	-11.80%	-0.06%
Max Drawdown (3Y) Largest decline over 3 years	-17.65%	-15.79%	-1.86%
Max Drawdown (5Y) Largest decline over 5 years	-18.09%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-43.99%	—	—
Current Drawdown Current decline from peak	-1.41%	-1.71%	+0.30%
Average Drawdown Average peak-to-trough decline	-7.46%	-9.07%	+1.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.49%	3.18%	+0.31%

Volatility

SPXX vs. ECAT - Volatility Comparison

The current volatility for Nuveen S&P 500 Dynamic Overwrite Fund (SPXX) is 3.42%, while BlackRock ESG Capital Allocation Term Trust (ECAT) has a volatility of 4.46%. This indicates that SPXX experiences smaller price fluctuations and is considered to be less risky than ECAT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPXX	ECAT	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.42%	4.46%	-1.04%
Volatility (6M) Calculated over the trailing 6-month period	9.14%	10.92%	-1.78%
Volatility (1Y) Calculated over the trailing 1-year period	12.14%	13.77%	-1.63%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.81%	16.91%	-1.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.41%	16.91%	+1.50%

SPXX vs. ECAT - Expense Ratio Comparison

SPXX has a 0.89% expense ratio, which is lower than ECAT's 1.38% expense ratio.

Dividends

SPXX vs. ECAT - Dividend Comparison

SPXX's dividend yield for the trailing twelve months is around 7.42%, less than ECAT's 21.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ECAT BlackRock ESG Capital Allocation Term Trust	19.91%	23.00%	17.44%	9.14%	8.94%	0.54%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SPXX Nuveen S&P 500 Dynamic Overwrite Fund	5.56%	7.48%	6.87%	7.82%	7.30%	5.27%	6.56%	6.44%	7.98%	5.69%	5.14%	7.75%

Frequently Asked Questions

Can I hold both SPXX and ECAT in my portfolio?

SPXX and ECAT have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPXX or ECAT?

ECAT has higher volatility (4.46%) compared to SPXX (3.42%). In terms of maximum drawdown, SPXX dropped -52.39% vs ECAT's -32.23%.

Which has better risk-adjusted returns?

ECAT currently has the higher Sharpe Ratio (1.33 vs 0.95), 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.