State Street SPDR S&P MIDCAP 400 ETF Trust (MDY)

U.S. mid-cap stocks, held through a cap-weighted index.

A broad-based core holding for a portfolio needing direct access to mid-sized U.S. companies.

8% of MDY is its ten largest holdings.

Less concentrated than 69% of US Mid Cap ETFs.

What's inside MDY: Size (Large 3%, Mid 90%, Small 8%); Geography (International 4%, US 96%); Tech 15.6%; AI 0.3%; Semiconductors 3.7%; Memory 1.2%.

Half of MDY's weight sits in its 113 largest positions, and once those weights are taken into account it behaves like 291 equally weighted holdings.