IDUB vs. SPY

Last updated Apr 1, 2026

Compare and contrast key facts about Aptus International Enhanced Yield ETF (IDUB) and State Street SPDR S&P 500 ETF (SPY).

IDUB and SPY are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. IDUB is an actively managed fund by Aptus. It was launched on Jul 22, 2021. SPY is a passively managed fund by State Street that tracks the performance of the S&P 500 Index. It was launched on Jan 22, 1993.

Performance

IDUB vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Aptus International Enhanced Yield ETF (IDUB) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

IDUB vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
IDUB Aptus International Enhanced Yield ETF	2.69%	27.53%	6.12%	9.07%	-19.79%	-1.25%
SPY State Street SPDR S&P 500 ETF	-4.37%	17.72%	24.89%	26.18%	-18.18%	8.69%

Returns By Period

In the year-to-date period, IDUB achieves a 2.69% return, which is significantly higher than SPY's -4.37% return.

IDUB

• 1D: 3.44%
• 1M: -7.91%
• YTD: 2.69%
• 6M: 7.43%
• 1Y: 25.47%
• 3Y*: 13.36%
• 5Y*: —
• 10Y*: —

SPY

• 1D: 2.91%
• 1M: -4.94%
• YTD: -4.37%
• 6M: -1.82%
• 1Y: 17.59%
• 3Y*: 18.19%
• 5Y*: 11.69%
• 10Y*: 13.98%

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

IDUB vs. SPY - Expense Ratio Comparison

IDUB has a 0.45% expense ratio, which is higher than SPY's 0.09% expense ratio.

IDUB

Aptus International Enhanced Yield ETF

SPY

State Street SPDR S&P 500 ETF

Return for Risk

IDUB vs. SPY — Risk / Return Rank

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

IDUB

IDUB Risk / Return Rank: 79
IDUB Sharpe Ratio Rank: 80
IDUB Sortino Ratio Rank: 81
IDUB Omega Ratio Rank: 80
IDUB Calmar Ratio Rank: 79
IDUB Martin Ratio Rank: 78

SPY

SPY Risk / Return Rank: 64
SPY Sharpe Ratio Rank: 56
SPY Sortino Ratio Rank: 60
SPY Omega Ratio Rank: 65
SPY Calmar Ratio Rank: 65
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.

IDUB vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Aptus International Enhanced Yield ETF (IDUB) 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.

	IDUB	SPY	Difference
Sharpe ratio Return per unit of total volatility	1.51	0.93	+0.58
Sortino ratio Return per unit of downside risk	2.10	1.45	+0.65
Omega ratio Gain probability vs. loss probability	1.31	1.22	+0.08
Calmar ratio Return relative to maximum drawdown	2.16	1.53	+0.63
Martin ratio Return relative to average drawdown	8.34	7.30	+1.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IDUB vs. SPY - Sharpe Ratio Comparison

The current IDUB Sharpe Ratio is 1.51, which is higher than the SPY Sharpe Ratio of 0.93. The chart below compares the historical Sharpe Ratios of IDUB and SPY, 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

	IDUB	SPY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.51	0.93	+0.58
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.69	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.78	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.28	0.56	-0.28

Correlation

The correlation between IDUB and SPY is 0.71, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

IDUB vs. SPY - Dividend Comparison

IDUB's dividend yield for the trailing twelve months is around 5.63%, more than SPY's 1.14% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IDUB Aptus International Enhanced Yield ETF	5.63%	4.90%	5.64%	3.71%	2.62%	1.38%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SPY State Street SPDR S&P 500 ETF	1.14%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Drawdowns

IDUB vs. SPY - Drawdown Comparison

The maximum IDUB drawdown since its inception was -29.20%, smaller than the maximum SPY drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for IDUB and SPY.

Drawdown Indicators

	IDUB	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-29.20%	-55.19%	+25.99%
Max Drawdown (1Y) Largest decline over 1 year	-11.46%	-12.05%	+0.59%
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	-8.42%	-6.24%	-2.18%
Average Drawdown Average peak-to-trough decline	-11.52%	-9.09%	-2.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.96%	2.52%	+0.44%

Volatility

IDUB vs. SPY - Volatility Comparison

Aptus International Enhanced Yield ETF (IDUB) has a higher volatility of 8.04% compared to State Street SPDR S&P 500 ETF (SPY) at 5.31%. This indicates that IDUB's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IDUB	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.04%	5.31%	+2.73%
Volatility (6M) Calculated over the trailing 6-month period	11.46%	9.47%	+1.99%
Volatility (1Y) Calculated over the trailing 1-year period	16.97%	19.05%	-2.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.45%	17.06%	-2.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.45%	17.92%	-3.47%