MDY Stock Summary and Trading Ideas (State Street SPDR S&P Midcap 400 ETF Trust | ARCA:MDY)

State Street SPDR S&P MIDCAP 400 ETF Trust seeks to provide investment results that, before expenses, correspond generally to the price and yield performance of the S&P MidCap 400 Index. The Trust seeks to achieve its investment objective by holding a portfolio of the common stocks that are included in the Index (the "Portfolio"), with the weight of each stock in the Portfolio substantially corresponding to the weight of such stock in the Index. The S&P MidCap 400 Index provides investors with a benchmark for mid-sized companies. The index, which is distinct from the large-cap S&P 500 , measures the performance of midsized companies, reflecting the distinctive risk and return characteristics of this market segment.

State Street SPDR S&P Midcap 400 ETF Trust trades on the ARCA stock market under the symbol MDY.

As of October 20, 2026, MDY stock price climbed to $666.92 with 708,427 million shares trading.

MDY has a beta of 0.70, meaning it tends to be less sensitive to market movements. MDY has a correlation of 0.41 to the broad based SPY ETF.

MDY has a market cap of $25.84 billion. This is considered a Large Cap stock.

In the last 3 years, MDY traded as high as $717.35 and as low as $424.22.

MDY has underperformed the market in the last year with a return of +13.1%, while the SPY ETF gained +15.7%. In the last 3 month period, MDY fell short of the market, returning -2.2%, while SPY returned +3.9%. However, in the most recent 2 weeks MDY has outperformed the stock market by returning -1.2%, while SPY returned -1.3%.

MDY support price is $655.03 and resistance is $665.77 (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 MDY shares will trade within this expected range on the day.