SPDR S&P 400 Mid Cap Growth ETF (MDYG) Exchange: NYSE ARCA

In seeking to track the performance of the S&P MidCap 400 Growth Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund generally invests substantially all, but at least 80%, of its total assets in the securities comprising the Index. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index, cash and cash equivalents or money market instruments, such as repurchase agreements and money market funds (including money market funds advised by the Adviser). In seeking to track the Index, the Fund's assets will generally be concentrated in an industry or group of industries to the extent that the Index concentrates in a particular industry or group of industries.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) earnings change to 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, NASDAQ Select Market, Investors Exchange (IEX), NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $2.4 billion and $8.2 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 1 or greater; (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 (measured using the sum of earnings over those quarters) and for the most recent quarter. The Index is market capitalization weighted and rebalanced annually on the third Friday of December. As of August 31, 2019, a significant portion of the Fund comprised companies in the technology and health care sectors, although this may change from time to time. As of August 31, 2019, the Index comprised 245 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.