17-Aug-2026
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State Street SPDR S&P 400 Mid Cap Growth ETF seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of an index that tracks the performance of medium capitalization exchange traded U.S. equity securities exhibiting "growth" characteristics. The Index measures the performance of the mid-capitalization growth segment of the U.S. equity market. The Index consists of those stocks in the S&P MidCap 400 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The selection universe for the S&P MidCap 400 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, To be included in the Index, a security should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters and for the most recent quarter.
State Street SPDR S&P 400 Mid Cap Growth ETF trades on the ARCA stock market under the symbol MDYG.
As of August 17, 2026, MDYG stock price climbed to $113.68 with 57,873 million shares trading.
MDYG has a beta of 0.84, meaning it tends to be less sensitive to market movements. MDYG has a correlation of 0.51 to the broad based SPY ETF.
MDYG has a market cap of $2.99 billion. This is considered a Mid Cap stock.
In the last 3 years, MDYG traded as high as $113.93 and as low as $64.67.
MDYG has outperformed the market in the last year with a price return of +28.0% while the SPY ETF gained +21.0%. MDYG has also outperformed the stock market ETF in the last 3 month and 2 week periods returning +6.1% and +6.4%, respectively, while the SPY returned +3.5% and +3.4%, respectively.
MDYG support price is $112.31 and resistance is $114.85 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that MDYG shares will trade within this expected range on the day.
