State Street® SPDR® S&P 400™ Mid Cap Growth ETF

What this fund is

State Street® SPDR® S&P 400™ Mid Cap Growth ETF is an exchange-traded fund (ETF) from SPDR, traded under the ticker MDYG (ISIN US78464A8210). It lets you buy a basket of holdings in a single trade, spreading your money across them rather than one company. In plain terms it is about owning small slices of companies, so you share in their growth when they do well — and their falls when they don't, spread across its target market. It follows the S&P MidCap 400 Growth Index index (passive investing): it tracks the market rather than relying on a manager, keeping running costs down, and its largest holdings include TWILIO INC A, CARPENTER TECHNOLOGY and CURTISS WRIGHT CORP.

It holds around 247 positions (the ten largest ≈ 14.1%), spreading risk so no single holding decides your outcome. By industry it concentrates most in ~27.7% Industrials and ~19.8% Technology. Investors often use a broad fund like this as a long-term 'core' holding — a single building block that covers much of a global portfolio in one trade. Its ongoing charge (TER) is 0.15% a year — about €15 a year on a €10,000 holding, taken automatically from the fund.

It holds the underlying investments directly (physical replication); it is domiciled in the United States and trades in USD. Its price has swung about 17.6% over the past year — a gauge of how much the value moves, not a judgement of quality. It launched in 2005. Like any investment, it can lose value as well as gain, and what it did before does not predict what it will do next. (Fund data sourced from SPDR.)