BOUT vs. MDYG

Last updated Jun 24, 2026

BOUT (Innovator IBD Breakout Opportunities ETF) and MDYG (SPDR S&P 400 Mid Cap Growth ETF) are both Mid Cap Growth Equities funds - BOUT tracks the IBD Breakout Stocks Total Return Index while MDYG tracks the S&P MidCap 400 Growth Index. Both are passively managed. Over the past 5 years, BOUT returned 8.29%/yr vs 8.25%/yr for MDYG. A 0.77 correlation means they provide meaningful diversification when combined. BOUT charges 0.80%/yr vs 0.15%/yr for MDYG.

Performance

BOUT vs. MDYG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Innovator IBD Breakout Opportunities ETF (BOUT) and SPDR S&P 400 Mid Cap Growth ETF (MDYG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BOUT achieves a 31.88% return, which is significantly higher than MDYG's 18.55% return.

BOUT

• 1D: -1.91%
• 1M: 3.56%
• YTD: 31.88%
• 6M: 28.55%
• 1Y: 34.68%
• 3Y*: 16.89%
• 5Y*: 8.29%
• 10Y*: —

MDYG

• 1D: -1.57%
• 1M: 2.52%
• YTD: 18.55%
• 6M: 15.99%
• 1Y: 29.41%
• 3Y*: 17.70%
• 5Y*: 8.25%
• 10Y*: 11.88%

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

BOUT vs. MDYG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
BOUT Innovator IBD Breakout Opportunities ETF	31.88%	-6.77%	18.82%	13.27%	-22.60%	22.69%	50.56%	20.59%	-30.42%
MDYG SPDR S&P 400 Mid Cap Growth ETF	18.55%	7.22%	15.84%	17.30%	-18.92%	18.46%	22.57%	26.10%	-18.63%

Correlation

The correlation between BOUT and MDYG is 0.80, 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	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (All Time) Calculated using the full available price history since Sep 13, 2018	0.77

The correlation between BOUT and MDYG has been stable across timeframes, ranging from 0.77 to 0.82 - a consistent structural relationship.

BOUT vs. MDYG - Sectors Allocation Comparison

Sectors	BOUT	MDYG
Technology	33.0%	24.8%
Financial Services	18.3%	6.7%
Basic Materials	12.3%	3.5%
Consumer Cyclical	10.8%	7.5%
Utilities	7.0%	2.0%
Healthcare	6.5%	13.7%
Consumer Defensive	4.8%	1.8%
Energy	4.0%	3.2%
Real Estate	3.9%	5.3%
Communication Services	3.3%	1.4%
Industrials	3.2%	30.2%

Return for Risk

BOUT vs. MDYG — Risk / Return Rank

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

BOUT

BOUT Risk / Return Rank: 51
BOUT Sharpe Ratio Rank: 49
BOUT Sortino Ratio Rank: 45
BOUT Omega Ratio Rank: 45
BOUT Calmar Ratio Rank: 64
BOUT Martin Ratio Rank: 54

MDYG

MDYG Risk / Return Rank: 57
MDYG Sharpe Ratio Rank: 52
MDYG Sortino Ratio Rank: 52
MDYG Omega Ratio Rank: 48
MDYG Calmar Ratio Rank: 63
MDYG Martin Ratio Rank: 68

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.

BOUT vs. MDYG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Innovator IBD Breakout Opportunities ETF (BOUT) and SPDR S&P 400 Mid Cap Growth ETF (MDYG). 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.

	BOUT	MDYG	Difference
Sharpe ratio: Return per unit of total volatility	1.59	1.68	-0.09
Sortino ratio: Return per unit of downside risk	2.17	2.40	-0.24
Omega ratio: Gain probability vs. loss probability	1.28	1.29	-0.02
Calmar ratio: Return relative to maximum drawdown	2.96	2.98	-0.02
Martin ratio: Return relative to average drawdown	8.76	11.83	-3.06

BOUT vs. MDYG - Sharpe Ratio Comparison

The current BOUT Sharpe Ratio is 1.59, which is comparable to the MDYG Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of BOUT and MDYG, 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

BOUT vs. MDYG - Drawdown Comparison

The maximum BOUT drawdown since its inception was -36.98%, smaller than the maximum MDYG drawdown of -58.44%. Use the drawdown chart below to compare losses from any high point for BOUT and MDYG.

Drawdown Indicators

	BOUT	MDYG	Difference
Max Drawdown Largest peak-to-trough decline	-36.98%	-58.44%	+21.46%
Max Drawdown (1Y) Largest decline over 1 year	-11.76%	-9.91%	-1.85%
Max Drawdown (3Y) Largest decline over 3 years	-25.31%	-25.45%	+0.14%
Max Drawdown (5Y) Largest decline over 5 years	-28.28%	-29.26%	+0.98%
Max Drawdown (10Y) Largest decline over 10 years	—	-39.27%	—
Current Drawdown Current decline from peak	-1.91%	-1.57%	-0.34%
Average Drawdown Average peak-to-trough decline	-12.29%	-8.01%	-4.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.97%	2.49%	+1.48%

Volatility

BOUT vs. MDYG - Volatility Comparison

Innovator IBD Breakout Opportunities ETF (BOUT) has a higher volatility of 8.27% compared to SPDR S&P 400 Mid Cap Growth ETF (MDYG) at 5.90%. This indicates that BOUT's price experiences larger fluctuations and is considered to be riskier than MDYG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BOUT	MDYG	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.27%	5.90%	+2.37%
Volatility (6M) Calculated over the trailing 6-month period	17.22%	13.90%	+3.32%
Volatility (1Y) Calculated over the trailing 1-year period	21.92%	17.63%	+4.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.71%	20.71%	-1.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.00%	21.08%	+1.92%

BOUT vs. MDYG - Expense Ratio Comparison

BOUT has a 0.80% expense ratio, which is higher than MDYG's 0.15% expense ratio.

Dividends

BOUT vs. MDYG - Dividend Comparison

BOUT's dividend yield for the trailing twelve months is around 0.26%, less than MDYG's 0.58% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BOUT Innovator IBD Breakout Opportunities ETF	0.26%	0.34%	0.60%	1.32%	1.35%	0.00%	0.00%	0.00%	0.22%	0.00%	0.00%	0.00%
MDYG SPDR S&P 400 Mid Cap Growth ETF	0.58%	0.75%	0.87%	1.20%	1.16%	0.69%	0.71%	1.21%	1.36%	2.23%	1.25%	2.51%

Frequently Asked Questions

Can I hold both BOUT and MDYG in my portfolio?

BOUT and MDYG have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BOUT or MDYG?

BOUT has higher volatility (8.27%) compared to MDYG (5.90%). In terms of maximum drawdown, BOUT dropped -36.98% vs MDYG's -58.44%.

Which ETF is better, BOUT or MDYG?

On 5-year performance, BOUT leads with 8.29% vs 8.25% for MDYG. On fees, MDYG is cheaper at 0.15% per year. On volatility, MDYG has been the lower-risk option at 5.90%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, BOUT or MDYG?

Over the 5-year period, BOUT has performed better with a 8.29% return vs 8.25%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, BOUT or MDYG?

MDYG is cheaper with a 0.15% expense ratio, compared with 0.80% for BOUT.

Which ETF pays a higher dividend yield, BOUT or MDYG?

MDYG has the higher dividend yield at 0.58%, compared with 0.26% for BOUT.

What is the main difference between BOUT and MDYG?

BOUT tracks IBD Breakout Stocks Total Return Index, while MDYG tracks S&P MidCap 400 Growth Index. They also come from different issuers: Innovator and State Street. Their fees differ too: 0.80% for BOUT and 0.15% for MDYG.

Which has better risk-adjusted returns?

MDYG currently has the higher Sharpe Ratio (1.68 vs 1.59), 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.