DRAM vs MDY ETF holdings comparison
Roundhill Memory ETF (DRAM) · SPDR S&P MIDCAP 400 ETF Trust (MDY)
DRAM and MDY overlap by 0% by portfolio weight. The remaining 100.0 percentage points are not counted as shared holdings weight by this calculation. They share 0 stocks;
The holdings dates differ. This can slightly understate overlap for funds tracking similar indexes.
What this means
DRAM and MDY share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold. It answers "how much of my money is in the same stocks either way?" See methodology.
This comparison covers normalized equity positions represented in the dataset. Cash, derivatives, options, structured notes, and other non-equity assets are not included, so the result is not a complete comparison of every asset or risk in either fund.
Top shared holdings
No shared stocks were found in the normalized issuer holdings used for this comparison. That result applies only to the holdings files and dates shown above.
Holdings only in DRAM or MDY
DRAM has 16 fund-only positions representing approximately 100.1 percentage points of reported exposure; MDY has 400 fund-only positions representing approximately 99.3 percentage points of reported exposure. These are positions whose normalized security identifiers appear in one issuer file but not the other.
Largest positions only in DRAM
| Company | Ticker | Weight |
|---|---|---|
| Samsung Electronics Co Ltd | 005930 | 25.32% |
| Micron Technology Inc | MU | 25.10% |
| Sk Hynix Inc | 000660 | 21.93% |
| Cxmt Corporation | N/A | 4.71% |
| Seagate Technology Holdings Plc | STX | 4.70% |
| Sandisk Corp | SNDK | 4.37% |
| Western Digital Corp | WDC | 4.03% |
| Kioxia Holdings Corp | 285A | 3.17% |
| Nanya Technology Corp | 2408 | 2.66% |
| Winbond Electronics Corp | 2344 | 1.25% |
Largest positions only in MDY
| Company | Ticker | Weight |
|---|---|---|
| Illumina Inc. | ILMN | 0.94% |
| Twilio Inc. Class A | TWLO | 0.94% |
| Everpure Inc. Class A | P | 0.89% |
| Technipfmc Plc | FTI | 0.83% |
| Ati Inc | ATI | 0.81% |
| Nvent Electric Plc | NVT | 0.68% |
| Carpenter Technology Corporation | CRS | 0.67% |
| Us Foods Holding Corp. | USFD | 0.66% |
| Tenet Healthcare Corporation | THC | 0.65% |
| Xpo Inc. | XPO | 0.62% |
FAQ
How much do DRAM and MDY overlap?
DRAM and MDY have 0% overlap by weight, sharing 0 equity positions (out of 16 in DRAM and 400 in MDY). The official holdings files used are dated 2026-08-27 for DRAM and 2026-08-25 for MDY.
What does 0% overlap mean?
DRAM and MDY share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
Which stocks do DRAM and MDY both hold?
DRAM and MDY have no shared stock positions in the normalized issuer holdings used for this comparison.
What holdings are different between DRAM and MDY?
DRAM has 16 positions not found in MDY, while MDY has 400 positions not found in DRAM. The largest fund-only positions and their weights are shown on this page.