You can now read 10 articles each month for free on BostonGlobe.com.

The Boston Globe

Business

PetSmart stock rises ahead of move onto S&P 500

Continue reading below

The pet-store chain will replace Sunoco on the S&P 500 at the end of trading Thursday. The S&P 500 is the most commonly used benchmark for stock mutual funds. When a company joins the index, mutual fund managers are more likely to buy it. Sunoco was bought by Energy Transfer Partners.

You have reached the limit of 10 free articles a month

Stay informed with unlimited access to Boston’s trusted news source.

  • High-quality journalism from the region’s largest newsroom
  • Convenient access across all of your devices
  • Today’s Headlines daily newsletter
  • Subscriber-only access to exclusive offers, events, contests, eBooks, and more
  • Less than $1 a week