Futures are edging down, putting the S&P 500 on course to hover near its record high. Here’s what we’re watching before Tuesday’s opening bell.

A teacher wearing a protective mask speaks to students using a Zoom Video Communications Inc. application at an elementary school in San Francisco, Oct. 5, 2020.

Photo: David Paul Morris/Bloomberg News

  • Shares of the latest short-squeeze target Support.com have calmed somewhat after their recent surge, but are still up 3.8% premarket. Other flagship meme stocks were also posting gentle rises ahead of the bell, with AMC Entertainment up 2.1% and GameStop up 1.4%.
  • Designer Brands jumped 7.5% premarket, after it said it turned a profit for the fiscal second quarter. The retailer reported higher store traffic while it sought to gain market share in the athleisure and children’s categories.
  • Experts advising the U.S. government on vaccines expressed initial support for giving booster shots to people vaccinated against Covid-19. But makers of vaccines approved for use in the U.S. mostly shrugged: Pfizer shed 0.3%, Moderna added 1.2% and Johnson & Johnson edged up 0.2%.
  • Robinhood Markets was down 4.2% premarket, extending its descent that came after the head of the SEC signaled he was open to banning payment for order flow—a practice that accounts for most of the online brokerage’s revenues.
  • China isn’t letting up on its regulatory push against its tech giants, but investors in their U.S.-listed shares are giving them a reprieve. NetEase gained 2.6% premarket, Alibaba added 3.2% and Pinduoduo gained 2.8%.
  • Nordson gained 1.8% off hours after the industrial-goods manufacturer raised its earnings-per-share forecast for fiscal 2021.
  • Shares of StoneCo dropped like a stone, falling 5.5% premarket. The Cayman Islands-based fintech reported a quarterly loss after Monday’s close.
  • CrowdStrike will report earnings after Tuesday’s close.
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