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MDY is a passive equity ETF designed to mirror the S&P MidCap 400 by holding the underlying mid-cap U.S. stocks in roughly the same market-cap weights as the index.
It uses a Unit Investment Trust (UIT) structure, meaning it primarily holds the index constituents directly and updates the portfolio in line with index changes (at least monthly).
The UIT setup limits certain operational tools (like interim dividend reinvestment and securities lending), which can slightly hurt tracking versus newer ETF structures.
You’re buying a big basket of mid-sized U.S. companies, not a few individual stocks. MDY aims to keep the basket’s mix similar to the S&P MidCap 400 so your returns look like that mid-cap index.
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Showing the largest holdings by weight in MDY
| Logo | Ticker | ETF Weight | Market Value | |
|---|---|---|---|---|
FT | FTI TechnipFMC plc | TechnipFMC plc | 0.89% | $223.7M |
| U.S. Dollar | U.S. Dollar | 0.87% | $218.3M | |
FL | FLEX Flex Ltd | Flex Ltd | 0.82% | $207.4M |
CW | CW Curtiss-Wright Corporation | Curtiss-Wright Corporation | 0.80% | $200.4M |
XP | XPO XPO Inc. | XPO Inc. | 0.74% | $186.6M |
UT | UTHR United Therapeutics Corporation | United Therapeutics Corporation | 0.74% | $186.1M |
WW | WWD Woodward Inc. | Woodward Inc. | 0.70% | $176.0M |
FN | FN Fabrinet | Fabrinet | 0.66% | $166.6M |
MT | MTZ MasTec Inc. | MasTec Inc. | 0.65% | $164.9M |
AT | ATI ATI Inc. | ATI Inc. | 0.65% | $163.1M |
Breakdown of MDY by sector weightings (%)
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Top countries by weight (%)
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