MDY · SPDR S&P MidCap 400 ETF Trust
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MDY tracks the S&P MidCap 400 and returned +12.8% over the past year.
MDY returned +12.8% over the year to Oct 28, 2026, charges 0.23% a year and holds $25.9bn in net assets on Oct 27, 2026.
Promise check: Not measuredNo other ETF tracks the index it names, so its tracking cannot be measured.
MDY risk and return scorecard
vs IJH · Jun 2000 to Oct 2026 · 1377 weekly returns · dividend-adjusted
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records; risk-free rate: U.S. Treasury, Daily Treasury Bill Rates, 13-week coupon equivalent Method · Data
Money in and out
Net fund flows · Oct 23, 2026What you earned
How concentrated, and what does it cost?
S&P MidCap 400 IndexMore on MDY
Every number below is on this page. Open what you need.Price, 1 year
$668.94+0.2%1 day, priceClose, Oct 28, 2026
Price only. Total return over the same days, distributions reinvested, was +12.8%. Computed by ETFIQ from Tiingo daily prices.
Source: Tiingo end-of-day prices. Data as of Oct 28, 2026. Updated every trading night. Report a data error
Points (pts) are percentage points.
| Window | Total return | Benchmark (IJH) | Gap to IJH | S&P 500 (SPY) |
|---|---|---|---|---|
| 1M Sep 28 – Oct 28, 2026 | +1.2% | +1.3% | −0.1 pts | +0.9% |
| 3M Jul 29 – Oct 28, 2026 | −1.6% | −1.5% | −0.1 pts | +6.1% |
| 6M Apr 29 – Oct 28, 2026 | +2.9% | +3.1% | −0.2 pts | +9.1% |
| YTD Dec 31, 2025 – Oct 28, 2026 | +11.7% | +12.0% | −0.3 pts | +14.1% |
| 1Y Oct 28, 2025 – Oct 28, 2026 | +12.8% | +13.2% | −0.4 pts | +13.6% |
| 3Y Oct 27, 2023 – Oct 28, 2026 | +63.0% | +64.5% | −1.5 pts | +95.0% |
| 5Y Oct 29, 2021 – Oct 28, 2026 | +39.7% | +41.4% | −1.7 pts | +79.8% |
| 10Y Oct 28, 2016 – Oct 28, 2026 | +178.2% | +184.1% | −5.9 pts | +325.8% |
| Since launch May 4, 1995 – Oct 28, 2026 | +2,675.2% | not available | not available | +2,454.2% |
| Since launch, annualised May 4, 1995 – Oct 28, 2026 | +11.1% | – | – | – |
Total returns, distributions reinvested.
Source: Tiingo end-of-day prices, with distributions reinvested.
Money in and out
Daily data · as of Oct 23, 2026MDY: in the year to Oct 23, 2026, net $339m went out; in the month to Oct 23, 2026, $170m came in.
Oct 21, 2026 to Oct 23, 2026
Sep 28, 2026 to Oct 23, 2026
Jul 28, 2026 to Oct 23, 2026
Jan 2, 2026 to Oct 23, 2026
Oct 28, 2025 to Oct 23, 2026
SEC filings, then daily counts
MDY, net flow each trading day over the 63 sessions from Jul 28, 2026 to Oct 23, 2026: money came in on 29 days and went out on 20 days.
Money in on 29 of the 63 trading days, out on 20.
MDY, net flow each trading day over the 249 sessions from Oct 28, 2025 to Oct 23, 2026: money came in on 100 days and went out on 100 days.
Money in on 100 of the 249 trading days, out on 100.
MDY, net flow each trading day over the 400 sessions from Mar 24, 2025 to Oct 23, 2026: money came in on 149 days and went out on 152 days.
Money in on 149 of the 400 trading days, out on 152.
MDY is one of 2 US-listed ETFs tracking the S&P MidCap 400. The money in and out of all 2, side by side.
Computed by ETFIQ from State Street’s daily data: each day’s change in shares outstanding times the previous day’s net asset value.
How this is computed
Percentages are of net assets at the start of each window. Numbers are net: money in less money out. Checked against the filing: The month’s daily sum and the filing’s B.6 number agree within rounding or, where the filing’s is larger, within rounding plus the fund’s creation and redemption fees. The full rule is in the fund’s flows file. Every day and month ETFIQ holds for MDY, back to Jul 2019, is in its flows file. Flows across every fund · How these flows are computed · Compare MDY with other funds in the flows tool
Every trading day, last 3 months63 days
Most recent first.
Week by week, last year52 weeks
Net flow into MDY each week, Oct 28, 2025 to Oct 23, 2026, most recent first, each week named by its last trading day with data. Computed by ETFIQ.
Month by month, money in and money outNov 2023 to Oct 2026
MDY, money in and money out each month from Nov 2023 to Sep 2026: two bars a month, money in above the line and money out below. Bars for Nov 2023 to Jun 2026 are from MDY’s SEC filings (N-PORT item B.6), and for Jul 2026 to Sep 2026 ETFIQ’s sums of its days. Oct 2026 is still in progress, so it is in the list and not drawn. Of the 36 months listed, money came in on net in 19 and went out in 17.
Bars for Nov 2023 to Jun 2026 are from MDY’s SEC filings (N-PORT item B.6), and for Jul 2026 to Sep 2026 ETFIQ’s sums of its days. Of the 36 months listed, money came in on net in 19 and went out in 17.
Most recent first.
How this is computed
N-PORT months: money in is sales plus reinvestments; money out is redemptions. Months summed from daily data: money in adds the days money came in; money out adds the days it went out.
N-PORT months are the filed sales plus reinvestments less redemptions. Later months add up the daily data; the Source column names any missing day.
Source: ETFIQ, from the fund’s daily share counts and net asset values, and its SEC N-PORT filings. Data as of Oct 23, 2026.
MDY key stats
Trading
as of Oct 27, 2026
MDY top ten by weight, 7.5% of the fund, of its 401 equity positions, from the holdings published by its issuer for Oct 27, 2026. An index fund holds what the index holds, so this is the index. Source: the issuer’s own daily file.
Source: State Street’s daily holdings file. Data as of Oct 27, 2026. Updated each trading day. Last checked Oct 28, 2026.
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About MDY
12 seats on MDY, as of Oct 28, 2026: 2 Supports, 2 Mixed, 5 Challenges, 3 Not enough data.
Questions people ask about MDY
- How has MDY performed?
- Over the year to Oct 28, 2026, MDY returned +12.8% with distributions reinvested, against +13.2% for its benchmark, the S&P MidCap 400 Index. Over three years the number is +63.0%.
- What does MDY cost?
- The prospectus expense ratio is 0.23% a year.
- What does MDY hold?
- 401 positions as published by its issuer for Oct 27, 2026, with the top ten at 7.5% of the fund. 0% of its weight is in stocks the S&P 500 also holds.
- How far is MDY below its high?
- 6.5% below its high of Aug 14, 2026, measured on the reinvested series to Oct 28, 2026.
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ETFIQ, MDY, stock fund, data as of Oct 28, 2026. https://etfiq.com/funds/mdy
ETFIQ. (Oct 28, 2026). MDY, stock fund. Retrieved from https://etfiq.com/funds/mdy
[MDY, stock fund (ETFIQ, Oct 28, 2026)](https://etfiq.com/funds/mdy)
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<figure style="margin:0;max-width:640px">
<a href="https://etfiq.com/funds/mdy"><img src="https://etfiq.com/assistant/api/embed/core/mdy.svg" alt="MDY: MDY over 1 year: total return +12.8%, its benchmark S&P MidCap 400 Index through IJH +13.2%, −0.4 pts. Data to Oct 28, 2026." width="640" style="max-width:100%;height:auto"></a>
<figcaption style="font:13px/1.5 sans-serif">MDY: MDY over 1 year: total return +12.8%, its benchmark S&P MidCap 400 Index through IJH +13.2%, −0.4 pts. Data to Oct 28, 2026. Data: <a href="https://etfiq.com/funds/mdy">ETFIQ</a></figcaption>
</figure>The day's ETF flows, a comparison and one number. Every trading morning. About the Daily
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