VO vs. MDYG

Last updated Apr 2, 2026

Compare and contrast key facts about Vanguard Mid-Cap ETF (VO) and SPDR S&P 400 Mid Cap Growth ETF (MDYG).

VO and MDYG are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. VO is a passively managed fund by Vanguard that tracks the performance of the CRSP US Mid Cap Index. It was launched on Jan 26, 2004. MDYG is a passively managed fund by State Street that tracks the performance of the S&P MidCap 400 Growth Index. It was launched on Nov 8, 2005. Both VO and MDYG are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

VO vs. MDYG - Performance Comparison

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

VO vs. MDYG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VO Vanguard Mid-Cap ETF	-0.05%	11.62%	15.31%	16.03%	-18.73%	24.70%	18.10%	30.98%	-9.24%	19.28%
MDYG SPDR S&P 400 Mid Cap Growth ETF	5.12%	7.22%	15.84%	17.30%	-18.92%	18.46%	22.57%	26.10%	-10.46%	19.61%

Returns By Period

In the year-to-date period, VO achieves a -0.05% return, which is significantly lower than MDYG's 5.12% return. Both investments have delivered pretty close results over the past 10 years, with VO having a 10.74% annualized return and MDYG not far behind at 10.61%.

VO

• 1D: 0.63%
• 1M: -5.18%
• YTD: -0.05%
• 6M: -0.76%
• 1Y: 13.07%
• 3Y*: 12.85%
• 5Y*: 6.79%
• 10Y*: 10.74%

MDYG

• 1D: 1.12%
• 1M: -5.69%
• YTD: 5.12%
• 6M: 6.18%
• 1Y: 22.14%
• 3Y*: 13.40%
• 5Y*: 5.95%
• 10Y*: 10.61%

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

VO vs. MDYG - Expense Ratio Comparison

VO has a 0.04% expense ratio, which is lower than MDYG's 0.15% 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%.

MDYG

SPDR S&P 400 Mid Cap Growth ETF

VO

Vanguard Mid-Cap ETF

Return for Risk

VO vs. MDYG — Risk / Return Rank

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

VO

VO Risk / Return Rank: 41
VO Sharpe Ratio Rank: 38
VO Sortino Ratio Rank: 38
VO Omega Ratio Rank: 39
VO Calmar Ratio Rank: 39
VO Martin Ratio Rank: 48

MDYG

MDYG Risk / Return Rank: 59
MDYG Sharpe Ratio Rank: 54
MDYG Sortino Ratio Rank: 57
MDYG Omega Ratio Rank: 53
MDYG Calmar Ratio Rank: 63
MDYG Martin Ratio Rank: 67

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.

VO vs. MDYG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mid-Cap ETF (VO) 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.

	VO	MDYG	Difference
Sharpe ratio Return per unit of total volatility	0.75	1.00	-0.25
Sortino ratio Return per unit of downside risk	1.15	1.54	-0.39
Omega ratio Gain probability vs. loss probability	1.16	1.21	-0.05
Calmar ratio Return relative to maximum drawdown	1.06	1.69	-0.63
Martin ratio Return relative to average drawdown	4.83	7.23	-2.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VO vs. MDYG - Sharpe Ratio Comparison

The current VO Sharpe Ratio is 0.75, which is comparable to the MDYG Sharpe Ratio of 1.00. The chart below compares the historical Sharpe Ratios of VO and MDYG, 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

	VO	MDYG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.75	1.00	-0.25
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.39	0.29	+0.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.57	0.51	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.45	+0.03

Correlation

The correlation between VO and MDYG is 0.92, 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

VO vs. MDYG - Dividend Comparison

VO's dividend yield for the trailing twelve months is around 1.50%, more than MDYG's 0.69% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VO Vanguard Mid-Cap ETF	1.50%	1.52%	1.49%	1.52%	1.60%	1.12%	1.45%	1.48%	1.82%	1.35%	1.45%	1.47%
MDYG SPDR S&P 400 Mid Cap Growth ETF	0.69%	0.75%	0.87%	1.20%	1.16%	0.69%	0.71%	1.21%	1.36%	2.23%	1.25%	2.51%

Drawdowns

VO vs. MDYG - Drawdown Comparison

The maximum VO drawdown since its inception was -58.87%, roughly equal to the maximum MDYG drawdown of -58.44%. Use the drawdown chart below to compare losses from any high point for VO and MDYG.

Drawdown Indicators

	VO	MDYG	Difference
Max Drawdown Largest peak-to-trough decline	-58.87%	-58.44%	-0.43%
Max Drawdown (1Y) Largest decline over 1 year	-12.74%	-13.66%	+0.92%
Max Drawdown (5Y) Largest decline over 5 years	-27.57%	-29.26%	+1.69%
Max Drawdown (10Y) Largest decline over 10 years	-39.37%	-39.27%	-0.10%
Current Drawdown Current decline from peak	-5.53%	-5.69%	+0.16%
Average Drawdown Average peak-to-trough decline	-7.91%	-8.08%	+0.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.79%	3.18%	-0.39%

Volatility

VO vs. MDYG - Volatility Comparison

The current volatility for Vanguard Mid-Cap ETF (VO) is 4.83%, while SPDR S&P 400 Mid Cap Growth ETF (MDYG) has a volatility of 7.89%. This indicates that VO experiences smaller price fluctuations and is considered to be less risky than MDYG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VO	MDYG	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.83%	7.89%	-3.06%
Volatility (6M) Calculated over the trailing 6-month period	9.73%	13.31%	-3.58%
Volatility (1Y) Calculated over the trailing 1-year period	17.57%	22.21%	-4.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.61%	20.55%	-2.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.94%	20.99%	-2.05%