VIOG vs. MDY

Last updated Jun 4, 2026

VIOG (Vanguard S&P Small-Cap 600 Growth ETF) and MDY (SPDR S&P MidCap 400 ETF) are both Small Cap Growth Equities funds - VIOG tracks the S&P SmallCap 600 Growth Index while MDY tracks the S&P MidCap 400 Index. Both are passively managed. Over the past 10 years, VIOG returned 10.83%/yr vs 11.04%/yr for MDY. Their correlation of 0.91 suggests significant overlap in exposure. VIOG charges 0.15%/yr vs 0.23%/yr for MDY.

Performance

VIOG vs. MDY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and SPDR S&P MidCap 400 ETF (MDY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VIOG achieves a 15.37% return, which is significantly higher than MDY's 13.91% return. Both investments have delivered pretty close results over the past 10 years, with VIOG having a 10.83% annualized return and MDY not far ahead at 11.04%.

VIOG

• 1D: -0.65%
• 1M: 0.86%
• YTD: 15.37%
• 6M: 13.49%
• 1Y: 26.34%
• 3Y*: 14.40%
• 5Y*: 5.47%
• 10Y*: 10.83%

MDY

• 1D: -0.09%
• 1M: 3.81%
• YTD: 13.91%
• 6M: 14.15%
• 1Y: 25.00%
• 3Y*: 15.77%
• 5Y*: 7.92%
• 10Y*: 11.04%

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

VIOG vs. MDY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VIOG Vanguard S&P Small-Cap 600 Growth ETF	15.37%	5.40%	9.23%	16.92%	-21.14%	22.49%	19.68%	21.16%	-4.57%	14.70%
MDY SPDR S&P MidCap 400 ETF	13.91%	7.19%	13.64%	16.07%	-13.28%	24.53%	13.50%	25.78%	-11.29%	15.93%

Correlation

The correlation between VIOG and MDY is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 10, 2010	0.91

The correlation between VIOG and MDY has been stable across timeframes, ranging from 0.91 to 0.96 - a consistent structural relationship.

VIOG vs. MDY - Sectors Allocation Comparison

Sectors	VIOG	MDY
Technology	19.7%	15.4%
Industrials	19.5%	25.1%
Healthcare	14.6%	8.7%
Financial Services	13.7%	13.9%
Consumer Cyclical	10.9%	10.8%
Real Estate	6.6%	7.7%
Energy	4.1%	5.6%
Consumer Defensive	3.3%	3.8%
Basic Materials	3.1%	4.8%
Communication Services	2.7%	1.0%
Utilities	1.7%	3.1%

Return for Risk

VIOG vs. MDY — Risk / Return Rank

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

VIOG

VIOG Risk / Return Rank: 49
VIOG Sharpe Ratio Rank: 42
VIOG Sortino Ratio Rank: 45
VIOG Omega Ratio Rank: 40
VIOG Calmar Ratio Rank: 58
VIOG Martin Ratio Rank: 57

MDY

MDY Risk / Return Rank: 50
MDY Sharpe Ratio Rank: 46
MDY Sortino Ratio Rank: 46
MDY Omega Ratio Rank: 44
MDY Calmar Ratio Rank: 56
MDY Martin Ratio Rank: 58

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.

VIOG vs. MDY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and SPDR S&P MidCap 400 ETF (MDY). 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.

	VIOG	MDY	Difference
Sharpe ratio: Return per unit of total volatility	1.52	1.63	-0.11
Sortino ratio: Return per unit of downside risk	2.27	2.39	-0.12
Omega ratio: Gain probability vs. loss probability	1.27	1.29	-0.02
Calmar ratio: Return relative to maximum drawdown	2.93	2.85	+0.08
Martin ratio: Return relative to average drawdown	10.01	10.38	-0.37
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VIOG vs. MDY - Sharpe Ratio Comparison

The current VIOG Sharpe Ratio is 1.52, which is comparable to the MDY Sharpe Ratio of 1.63. The chart below compares the historical Sharpe Ratios of VIOG and MDY, 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

	VIOG	MDY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.52	1.63	-0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	0.40	-0.15
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.48	0.52	-0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.53	+0.07

Drawdowns

VIOG vs. MDY - Drawdown Comparison

The maximum VIOG drawdown since its inception was -41.73%, smaller than the maximum MDY drawdown of -55.33%. Use the drawdown chart below to compare losses from any high point for VIOG and MDY.

Drawdown Indicators

	VIOG	MDY	Difference
Max Drawdown Largest peak-to-trough decline	-41.73%	-55.33%	+13.60%
Max Drawdown (1Y) Largest decline over 1 year	-9.03%	-8.82%	-0.21%
Max Drawdown (3Y) Largest decline over 3 years	-27.35%	-24.03%	-3.32%
Max Drawdown (5Y) Largest decline over 5 years	-29.15%	-24.03%	-5.12%
Max Drawdown (10Y) Largest decline over 10 years	-41.73%	-42.22%	+0.49%
Current Drawdown Current decline from peak	-1.47%	-0.09%	-1.38%
Average Drawdown Average peak-to-trough decline	-7.62%	-7.03%	-0.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.64%	2.42%	+0.22%

Volatility

VIOG vs. MDY - Volatility Comparison

Vanguard S&P Small-Cap 600 Growth ETF (VIOG) has a higher volatility of 4.61% compared to SPDR S&P MidCap 400 ETF (MDY) at 4.33%. This indicates that VIOG's price experiences larger fluctuations and is considered to be riskier than MDY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VIOG	MDY	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.61%	4.33%	+0.28%
Volatility (6M) Calculated over the trailing 6-month period	12.44%	11.28%	+1.16%
Volatility (1Y) Calculated over the trailing 1-year period	17.48%	15.48%	+2.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.47%	19.77%	+1.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.84%	21.19%	+1.65%

VIOG vs. MDY - Expense Ratio Comparison

VIOG has a 0.15% expense ratio, which is lower than MDY's 0.23% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VIOG vs. MDY - Dividend Comparison

VIOG's dividend yield for the trailing twelve months is around 0.84%, less than MDY's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MDY SPDR S&P MidCap 400 ETF	1.04%	1.15%	1.18%	1.21%	1.37%	0.96%	1.12%	1.34%	1.39%	1.18%	1.31%	1.35%
VIOG Vanguard S&P Small-Cap 600 Growth ETF	0.84%	1.04%	1.03%	1.15%	1.17%	0.69%	0.68%	1.09%	0.76%	0.87%	0.92%	1.04%

Frequently Asked Questions

Can I hold both VIOG and MDY in my portfolio?

With a correlation of 0.93, VIOG and MDY move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, VIOG or MDY?

VIOG has higher volatility (4.61%) compared to MDY (4.33%). In terms of maximum drawdown, VIOG dropped -41.73% vs MDY's -55.33%.

Which ETF is better, VIOG or MDY?

On 10-year performance, MDY leads with 11.04% vs 10.83% for VIOG. On fees, VIOG is cheaper at 0.15% per year. On volatility, MDY has been the lower-risk option at 4.33%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VIOG or MDY?

Over the 10-year period, MDY has performed better with a 11.04% return vs 10.83%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VIOG or MDY?

VIOG is cheaper with a 0.15% expense ratio, compared with 0.23% for MDY.

Which ETF pays a higher dividend yield, VIOG or MDY?

MDY has the higher dividend yield at 1.04%, compared with 0.84% for VIOG.

What is the main difference between VIOG and MDY?

VIOG tracks S&P SmallCap 600 Growth Index, while MDY tracks S&P MidCap 400 Index. They also come from different issuers: Vanguard and State Street. Their fees differ too: 0.15% for VIOG and 0.23% for MDY.

Which has better risk-adjusted returns?

MDY currently has the higher Sharpe Ratio (1.63 vs 1.52), 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.