The operator of the S&P 500 has decided to maintain its existing guidelines for when large ‘MegaCap’ companies are eligible for inclusion in its stock indexes. In an announcement made on Thursday, S&P Dow Jones Indices explained its index committee considered responses from a broad array of market participants but opted against modifying its inclusion criteria for the S&P 500, S&P MidCap 400, or S&P SmallCap 600 indexes.
The criteria for inclusion require a company to have its headquarters in the United States, be listed on the NYSE or Nasdaq, and show profitability over the last year. Furthermore, companies that have recently completed initial public offerings (IPOs) must be traded on an ‘eligible exchange’ for a minimum of 12 months before they can be considered for inclusion. The committee debated shortening this requirement to six months but decided to retain the original 12-month period. Additionally, the committee chose not to create exclusions based solely on market capitalization, which measures a company’s value according to the stock market.
Other major index operators in the U.S. have made moves to include large companies soon after their market debut. In March, Nasdaq introduced new guidelines allowing quickly adding large companies following their IPOs into the Nasdaq 100 Index. This change aims to ensure the index, which tracks the 100 largest non-financial companies listed on the Nasdaq, reflects market changes promptly rather than months later.
S&P recognized potential trade-offs with adhering to its current eligibility guidelines but emphasized that their approach ensures ‘substantial market coverage and sector balance’ within its indexes. Many pension plans and mutual funds use S&P and Nasdaq indexes as benchmarks for investing.
The decisions by S&P and Nasdaq coincide with several large U.S. artificial intelligence companies gearing up for significant IPOs this year. Notably, Elon Musk’s SpaceX is expected to go public soon, with aims to raise up to $75 billion, potentially marking the largest IPO ever. Additionally, Anthropic, known for the Claude chatbot, has announced plans for an IPO, while OpenAI, developers of ChatGPT, is preparing for a public offering as early as this fall.