MDY — State Street SPDR S&P MIDCAP 400 ETF Trust
US Mid Cap Ranked #229 of 458 tracked ETFs · Issued by State Street Investment Management
MDY Price Performance — Growth of $10,000
Value of a $10,000 investment in MDY over time, compared with SPY. Both lines are rebased to $10,000 on the first shared date. Based on total returns — prices are adjusted for dividends and splits, so this assumes distributions were reinvested. Hover or tap the chart for exact values.
MDY Drawdown
The "underwater" chart: MDY's decline from its highest prior value at each point in time. It shows how deep past losses ran and how long the fund took to recover to break-even.
What If You'd Invested in MDY?
See what a lump sum in MDY would have grown to, with the option to add a regular monthly contribution on top. Figures use total returns — dividends are assumed reinvested.
Past performance doesn't predict future results. Assumes contributions on the first trading day of each month, no trading costs or taxes, and reinvested distributions. History is limited to the range published in the site's daily return data.
Overview
The State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) is a US Mid Cap ETF, issued by State Street Investment Management. With an overall rank of #229 out of 458 tracked ETFs, it holds a moderate position in the market. The expense ratio of 0.23% and a dividend yield of 0.98% indicate a cost-effective and modest income-generating fund. Its price of $699.60 and assets under management (AUM) of $26.5B suggest a well-adopted fund, with a significant investment base supporting its liquidity and market presence.
The performance of MDY shows a mixed pattern across different time horizons. In the short term, the fund has seen a 1-day return of +0.48%, indicating stability. Over the medium term, the 1M return of +1.70% and 3M return of +5.43% suggest a gradual upward trend. However, the 1W return of -2.41% indicates a recent dip, which could be a short-term volatility. The 6M and YTD returns of +6.75% and +15.01%, respectively, show a positive trend, while the 1Y and 3Y returns of +21.93% and +52.44% indicate a strong long-term performance. This pattern suggests that the fund has been resilient in the short term but has shown consistent growth over the long term.
MDY is categorized as a fund with a moderate volatility label, a beta of 0.99, a Sharpe ratio of 1.09, and a maximum drawdown of -24.03%. The moderate volatility suggests that the fund experiences fluctuations similar to the broader market but with less extreme movements. The beta of 0.99 indicates that the fund's price movements are closely aligned with the S&P MidCap 400 index, making it a relatively stable investment in both up and down markets. The Sharpe ratio of 1.09 implies that the fund provides a good risk-adjusted return, meaning that for every unit of risk taken, it generates a satisfactory return. The maximum drawdown of -24.03% reflects the fund's potential for significant losses during market downturns, but the overall performance metrics suggest that it has managed to recover and maintain a positive trend over the long term.
AI-generated summary based on the data on this page.
Market Backdrop
10-Year Treasury Yield: 4.69% (as of 2026-08-20) — The yield on 10-year US Treasury bonds — the standard "risk-free rate" benchmark used to contextualize this fund’s Sharpe ratio and returns.
CBOE Volatility Index (VIX): 16.01 (as of 2026-08-20) — A real-time gauge of expected S&P 500 volatility over the next 30 days — useful context for this fund’s own volatility label.
Federal Funds Rate: 3.63% (as of 2026-07-01) — The Federal Reserve’s target policy rate, which anchors short-term borrowing costs across the economy.
What MDY's Fees Cost You
MDY charges an expense ratio of 0.23% a year, deducted automatically from the fund's value. Small percentages compound into real money — adjust the figures below to see the impact on your own numbers.
Assumes a constant gross return and no additional contributions — a simplification, but it isolates exactly what the expense ratio costs. Try the full fee calculator to model contributions and compare any two funds.
MDY Dividend Income Estimator
MDY currently yields 0.98%. Enter an amount to see the income that implies, or set a monthly income target to see the investment it would take.
Based on the fund's current trailing yield, which varies with price and distributions — treat it as an estimate, not a guarantee. Yields are not adjusted for tax.
MDY Liquidity, Domicile & Tax Treatment
Liquidity: Quoted bid/ask spread is 6.62% and average daily volume is 694K/day. Tighter spreads and higher volume mean lower round-trip trading costs; this is a live-market snapshot and can widen during volatile sessions. AUM of $26.5B provides ample scale, supporting tight spreads and issuer commitment to keep the fund open.
Domicile & tax treatment: MDY is a US-domiciled, SEC-registered ('40 Act) exchange-traded fund. Dividends and capital gains distributions are reported to US investors on Form 1099-DIV, and the fund is not subject to the PFIC reporting or UCITS-specific rules that apply to Irish- or Luxembourg-domiciled funds. Non-US investors should note that US-domiciled ETFs are generally subject to 30% US withholding tax on dividends (unless reduced by treaty) and to US estate tax exposure on the position — Irish-domiciled UCITS ETFs tracking the same index often avoid both, which is why non-US residents frequently prefer the UCITS equivalent where one exists. This is general information, not tax advice — consult a tax professional for your situation.
MDY Performance History
| Period | Return |
|---|---|
| 1-Day | +0.48% |
| 1-Week | -2.41% |
| 1-Month | +1.70% |
| 3-Month | +5.43% |
| 6-Month | +6.75% |
| YTD | +15.01% |
| 1-Year | +21.93% |
| 3-Year | +52.44% |
How MDY Compares to Other US Mid Cap ETFs
| Rank | Grade | Ticker | Name | 1-Year | Exp. Ratio | AUM |
|---|---|---|---|---|---|---|
| #26 | B+ |
VOE | Vanguard Morningstar Mid-Cap Value ETF | +24.44% | 0.05% | $38.6B |
| #64 | B |
IWS | iShares Russell Mid-Cap Value ETF | +28.18% | 0.23% | $15.5B |
| #125 | B |
SCHM | Schwab U.S. Mid-Cap ETF | +27.16% | 0.03% | $14.5B |
| #137 | B |
IWR | iShares Russell Mid-Cap ETF | +21.93% | 0.18% | $55.9B |
| #147 | B |
VO | Vanguard Morningstar Mid-Cap ETF | +17.56% | 0.03% | $225B |
| #174 | B |
IJH | iShares Core S&P Mid-Cap ETF | +22.38% | 0.05% | $122B |
| #210 | C |
SPMD | State Street SPDR Portfolio S&P 400 Mid Cap ETF | +22.39% | 0.03% | $18.3B |
| #229 | C |
MDY | State Street SPDR S&P MIDCAP 400 ETF Trust | +21.93% | 0.23% | $26.5B |
| #231 | C |
IJK | iShares S&P Mid-Cap 400 Growth ETF | +24.94% | 0.16% | $10.7B |
| #249 | C |
MDYG | State Street SPDR S&P 400 Mid Cap Growth ETF | +25.02% | 0.15% | $2.81B |
| #272 | C |
IJJ | iShares S&P Mid-Cap 400 Value ETF | +19.48% | 0.18% | $8.82B |
| #295 | C |
MDYV | State Street SPDR S&P 400 Mid Cap Value ETF | +19.43% | 0.15% | $2.78B |
| #312 | C |
VOT | Vanguard Morningstar Mid-Cap Growth ETF | +8.09% | 0.05% | $33.5B |
| #396 | D |
IWP | iShares Russell Mid-Cap Growth ETF | +3.26% | 0.23% | $19.7B |