MDY
SPDR S&P MidCap 400 ETF, Mid-Cap Blend, State Street Investment Management.
Data through 2026-09-02
View as Markdown
Cost per year
0.23%
$23 a year on $10,000
Positions
400
7.8% in the ten largest
Assets
$26.5B
under management
Return, 3 years
44.3%
cumulative, total return
Volatility
16.4%
annualised, 3 years of weekly returns
Worst fall
-24.0%
peak to trough, 3 years
What MDY duplicates
Owning MDY alongside any of these means holding the same companies twice. The first column is the share of combined weight sitting in companies both funds hold.
| Fund | Overlap by weight | Share of MDY also held there | Share of that fund also in MDY | Companies in both | |
|---|---|---|---|---|---|
| VB | 44.1% | 99.3% | 44.1% | 397 | |
| VBR | 41.8% | 57.9% | 41.8% | 257 | |
| SCHA | 31.4% | 41.9% | 31.5% | 230 | |
| IWM | 11.3% | 11.9% | 13.3% | 79 | |
| VNQ | 7.1% | 7.1% | 13.6% | 29 | |
| VFH | 6.2% | 15.0% | 6.2% | 64 | |
| IBB | 5.2% | 5.2% | 12.9% | 13 | |
| SCHV | 5.2% | 46.3% | 5.2% | 135 | |
| VHT | 5.1% | 10.5% | 5.1% | 35 | |
| VTI | 4.9% | 99.3% | 4.9% | 397 | |
| SCHB | 4.8% | 99.7% | 4.8% | 399 | |
| VYM | 4.4% | 30.8% | 4.4% | 148 |
Measured across the 61 US ETFs covered here, from the issuer files published on the dates below. Check any other pair.
What it holds
| Rank | Company | Weight | |
|---|---|---|---|
| 1 | TWLO | 0.98% | |
| 2 | ILMN | 0.88% | |
| 3 | FTI | 0.88% | |
| 4 | P | 0.83% | |
| 5 | OKTA | 0.79% | |
| 6 | ATI | 0.77% | |
| 7 | NVT | 0.67% | |
| 8 | CRS | 0.66% | |
| 9 | USFD | 0.66% | |
| 10 | THC | 0.64% | |
| 11 | UTHR | 0.61% | |
| 12 | XPO | 0.61% | |
| 13 | CW | 0.6% | |
| 14 | CDE | 0.59% | |
| 15 | RGLD | 0.58% | |
| 16 | ROKU | 0.57% | |
| 17 | WWD | 0.56% | |
| 18 | RS | 0.56% | |
| 19 | ENTG | 0.56% | |
| 20 | SNX | 0.53% | |
| 21 | PR | 0.53% | |
| 22 | OVV | 0.52% | |
| 23 | NTNX | 0.5% | |
| 24 | ITT | 0.49% | |
| 25 | EWBC | 0.49% |
The 25 largest of 400 positions, from the issuer file published 01-Sep-2026.
Cost, returns and risk
| Expense ratio | 0.23% |
|---|---|
| Dividend yield | 1.02% |
| Total return, 1 year | 16.1% |
| Total return, 3 years cumulative | 44.3% |
| Total return, 5 years cumulative | 42.9% |
| Volatility, annualised | 16.4% |
| Worst fall, 3 years | -24.0% |
| Beta against the S&P 500 | 0.91 |
| Weight in the ten largest positions | 7.8% |
| Largest single position | 1.0% |
| Assets under management | $26.5B |
How it moves with the market
| Against | Correlation, 3 years | Covariance, annualised (%2) |
|---|---|---|
| SPY | 0.80often in step | 190 |
| QQQ | 0.67loosely linked | 214 |
Weekly total returns. Divide a covariance by the two volatilities to get the correlation beside it. What the bands mean
Year by year
| Year | Total return |
|---|---|
| 2026 | 13.3% |
| 2025 | 7.2% |
| 2024 | 13.6% |
| 2023 | 16.1% |
| 2022 | -13.3% |
One year
MDY 114
SPY 117
2025-09-122026-09-04
Where to go next
- VO, Vanguard Mid-Cap ETF
- Run a portfolio x-ray to see what MDY carries once you look through it
Holdings from the issuer file published 01-Sep-2026. Prices through 2026-09-02. How every figure here is produced. Measurements, not investment advice.
