State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) is a US mid-cap ETF. As of October 28, 2026, ETF Copilot scores MDYG 4.6 out of 10 — highest on Growth (6.8), lowest on Value (3.3). It trades at 25.2 times earnings, against its own median of 23.4. Its ten largest holdings are 14% of the fund.
What stands out in MDYG's data
U.S. mid-cap growth stocks, screened for above-average earnings momentum.
Trades at a richer price than most mid-cap peers — higher growth expectations baked in.
Its trailing EBITDA multiple of 16.8x sits above the category median of 13.9x and its own five-year median of 14.7x. The expense ratio of 0.15% matches the category norm.
A growth-oriented tilt within a mid-cap allocation, carrying a higher entry price.
Why did MDYG move this week? It fell 0.8% in the week to October 28, 2026 — Carpenter Technology and Corcept Therapeutics drove it
MDYG fell 0.8% in the week to October 28, 2026. The holdings that moved it most were Carpenter Technology (−23.9%), Corcept Therapeutics (−25.8%) and ATI (−8.5%); Okta (+6.7%) pushed the other way.
How is MDYG rated? ETF Copilot scores State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) 4.6 out of 10
As of October 28, 2026, ETF Copilot scores State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) 4.6 out of 10 overall.
ETF Copilot scores (0–10 scale, higher is better):
- Overall: 4.6 / 10
- Growth: 6.8 / 10
- Value: 3.3 / 10
- Risk: 3.8 / 10
- Quality: 4.0 / 10
- Return: 4.2 / 10
Is MDYG expensive right now? It trades at 25.2 times earnings, against its own median of 23.4
As of October 28, 2026, MDYG is more expensive than 65% of its own last 9 years.
Trailing 12 months, built from MDYG's holdings. How we calculate this →
What's inside MDYG? 22% Tech
What's inside MDYG: Size (Large 2%, Mid 93%, Small 5%); Geography (International 7%, US 93%); Tech 22.2%; AI 1.1%; Semiconductors 5.4%; Memory 1.6%.
What are MDYG's top holdings? The ten largest are 14% of the fund
Okta, Technipfmc, United Therapeutics, ATI, Tenet Healthcare, XPO, Nvent Electric, Roku, Royal Gold and Dynatrace are MDYG's largest holdings, in that order.
More concentrated than 65% of US Mid Cap ETFs.
Half of MDYG's weight sits in its 61 largest positions, and once those weights are taken into account it behaves like 157 equally weighted holdings.
What is MDYG's expense ratio? 0.15% a year
As of October 28, 2026, MDYG charges 0.15% a year, yields 0.68% and holds $2.8B in assets across 247 positions.
| Measure | MDYG |
|---|---|
| Expense ratio | 0.15% |
| Dividend yield | 0.68% |
| Assets under management | $2.8B |
| Holdings | 247 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Cite this
ETF Copilot, “State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) scores and holdings analysis”, as of October 28, 2026.
https://etf-copilot.com/etf/mdyg
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