When stocks are added to widely followed benchmarks, such as the S&P 500 Index ($SPX) and the Nasdaq Composite ($NASX), it's generally seen as a positive development. First, being a member stock of these prestigious indices, alongside companies with strong legacies and reputations in their respective industries, can help to burnish a growing company's credibility and acceptance among the investor community.
Second, and on a more practical level, these new index entrants also attract new buying interest from the various funds and indices dedicated to tracking these market-leading benchmarks, which is generally expected to give a boost to their stock prices.
