State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) seeks to track the S&P MidCap 400 Growth Index, which measures the performance of mid-capitalization U.S. companies exhibiting growth characteristics like higher price-to-earnings ratios, earnings growth rates, and sales growth compared to value counterparts.
How It Works
MDYG uses a passively managed, market-capitalization-weighted approach that mirrors its benchmark index. The fund holds approximately 200 mid-cap growth stocks selected from the S&P MidCap 400 universe based on growth metrics including earnings growth, sales growth, and momentum factors. Holdings are weighted by market value and rebalanced quarterly to maintain alignment with index changes and growth criteria updates.
Key Features
- Focuses exclusively on growth-oriented mid-cap companies, filtering out value stocks for concentrated growth exposure
- Targets the mid-cap sweet spot with companies typically valued between $2-10 billion in market capitalization
- Part of State Street's comprehensive SPDR lineup allowing precise style-box allocation within mid-cap equity exposure
Risks
- This ETF can lose significant value during growth stock selloffs, as high-valuation companies often decline 40-50% when investors rotate to value stocks
- Mid-cap stocks exhibit higher volatility than large-caps, with potential for 20-30% swings during normal market cycles due to lower liquidity
- Growth premium risk means the fund underperforms during value cycles when investors favor cheaper, dividend-paying stocks over high-growth companies
Who Should Own This
Best suited as a satellite holding (10-20% of equity allocation) for growth-focused investors with 3-5 year time horizons and medium-to-high risk tolerance. Complements large-cap core holdings for investors seeking diversified growth exposure across market capitalizations in tax-advantaged accounts.