Lululemon’s stock to join S&P 500 index By: MarketWatch October 13, 2023 at 18:01 PM EDT Lululemon's stock jumps more than 5% on news it will join the S&P 500 by next week, replacing Activision Blizzard. Read More >> Related Stocks: Hubbell Inc B Lululemon Athletica Organon & Co.