MDYvsSPMDETF Comparison
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The ETFs State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) and State Street SPDR Portfolio S&P 400 Mid Cap ETF (SPMD) track the S&P MidCap 400 Total Return Index - USD and belong to the same industry segment: US Mid Cap. Both ETFs have the same top 3 sector exposures: Finance, Industrials and Technology. MDY is more expensive with a Total Expense Ratio (TER) of 0.23%, versus 0.03% for SPMD. MDY is up 10.9% year-to-date (YTD) with -$854M in YTD flows. SPMD performs better with 11.19% YTD performance, and +$1.88B in YTD flows. Run a side-by-side ETF comparison of MDY and SPMD below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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MDY vs SPMD performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/22/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MDY SPMD | -0.94%-0.93% | -3.58%-3.56% | +10.90%+11.19% | +13.56%+13.92% | +58.83%+60.26% | +38.58%+40.33% |
| Flows | MDY SPMD | +$169M+$271M | -$133M+$814M | -$854M+$1.88B | -$215M+$2.34B | -$628M+$7.39B | -$1.65B+$9.89B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MDY SPMD | +11.95%+12.12% | +15.00%+14.95% | +17.59%+17.66% | +19.65%+19.52% |
| Max drawdown | MDY SPMD | -8.21%-8.24% | -8.78%-8.82% | -23.91%-23.98% | -23.91%-23.98% |
| Max drawdown duration | MDY SPMD | 67d67d | 53d53d | 379d379d | 379d379d |
Trading data
MDY | SPMD | |
Last sale 10/23/2026 at 1:30 PM | $660.16 | $63.40 |
| Previous close 10/22/2026 | $664.00 | $63.75 |
| Consolidated volume 10/22/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 2026
1-year trailing difference
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MDY | SPMD | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/23/2026 at 1:30 PM
Live
Closed
MDY | SPMD | |
|---|---|---|
| Last price | $660.16 | $63.40 |
| 1D performance | -0.58% | -0.55% |
| AuM | $25.74 B | $18.39 B |
| E/R | 0.23% | 0.03% |
Characteristics
MDY | SPMD | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | State Street Investment Management |
| Benchmark | S&P MidCap 400 Index | S&P MidCap 400 Index |
| N° of holdings | 400 | 400 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 4, 1995 | November 8, 2005 |
| ESG | No | No |
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Exposure
Countries
MDY
USA
95.7%
Other
4.3%
SPMD
USA
96.33%
Other
3.67%
Sectors
MDY
Finance
22.65%
Industrials
16.23%
Technology
14.33%
Non-Energy Materi.
10.49%
Healthcare
10.19%
Other
26.11%
SPMD
Finance
22.8%
Industrials
16.34%
Technology
14.42%
Non-Energy Materi.
10.56%
Healthcare
10.26%
Other
25.62%
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Diversification
MDY
Total weight of top 15 holdings out of 15
10.81%
SPMD
Total weight of top 15 holdings out of 15
10.89%
Top 15 holdings
Data as of August 31, 2026
MDY
Twilio, Inc.
1.00%
Illumina, Inc.
0.90%
TechnipFMC plc
0.87%
Everpure, Inc.
0.82%
Okta, Inc.
0.81%
ATI, Inc.
0.78%
nVent Electric Plc
0.68%
Carpenter Technology Corp.
0.66%
US Foods Holding Corp.
0.64%
Tenet Healthcare Corp.
0.64%
XPO, Inc.
0.63%
United Therapeutics Corp.
0.60%
Curtiss-Wright Corp.
0.60%
Coeur Mining, Inc.
0.60%
Royal Gold, Inc.
0.59%
SPMD
Twilio, Inc.
1.00%
Illumina, Inc.
0.91%
TechnipFMC plc
0.87%
Everpure, Inc.
0.82%
Okta, Inc.
0.81%
ATI, Inc.
0.78%
nVent Electric Plc
0.68%
Carpenter Technology Corp.
0.66%
US Foods Holding Corp.
0.65%
Tenet Healthcare Corp.
0.64%
XPO, Inc.
0.64%
United Therapeutics Corp.
0.61%
Curtiss-Wright Corp.
0.60%
Coeur Mining, Inc.
0.60%
Royal Gold, Inc.
0.60%
Frequently asked questions about MDY and SPMD
How have the MDY and SPMD ETFs performed in 2026?
As of October 22, 2026, MDY is up 10.9% year-to-date (YTD), while SPMD has returned 11.19%. That puts SPMD better performer ahead so far this year.
Which ETF is attracting more investor money: MDY or SPMD?
Year-to-date, the MDY ETF saw -$854M in flows, compared to +$1.88B for SPMD.
Which ETF is more volatile: MDY or SPMD?
Over the past year, MDY had a volatility of 15%, while SPMD experienced 14.95%.
Which ETF is bigger: MDY or SPMD?
As of October 22, 2026, MDY holds $25.74 B in assets under management (AUM), while SPMD manages $18.39 B.
What sectors do the MDY and SPMD ETFs invest in?
MDY leans toward sectors like Finance, Industrials and Technology. Meanwhile, SPMD focuses on Finance, Industrials and Technology.
What are the top holdings of the MDY ETF and SPMD ETF?
MDY top holdings include Twilio, Inc., Illumina, Inc. and TechnipFMC plc. SPMD holds in its top three: Twilio, Inc., Illumina, Inc. and TechnipFMC plc.
Which ETF is more diversified: MDY or SPMD?
MDY holds 400 securities with 10.81% of its assets in the top 15. SPMD has 400 securities and a top 15 weight of 10.89%.
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