Stock futures are wavering as investors monitor tensions between Russia and Ukraine and await minutes from the Federal Reserve’s January meeting. Here’s what we’re watching in Wednesday’s trading:

• Roblox shares plunged 16% ahead of the bell after the social-gaming platform’s earnings report came in below expectations.

• Airbnb shares rose 3.1% premarket. The company posted record revenue last year, becoming one of the biggest beneficiaries of a battered travel industry as consumers sought suburban rentals, and projected continued growth as it emerges from the pandemic.
• ViacomCBS fell 9.7%. The company said it is renaming itself Paramount Global and will refer to itself as Paramount, underscoring its emphasis on its Paramount+ streaming service and evoking the heritage of its roughly century-old film studio.
• Altria added 0.4%. The biggest U.S. cigarette company can keep its investment in Juul, a judge ruled. The FTC had sued to unwind the e-cigarette deal, saying it violated antitrust laws.
• Hilton Worldwide , Kraft Heinz and Shopify are due to report earnings before the open.
• SeaWorld Entertainment signaled it was unlikely to pursue a deal for Cedar Fair after the latter rejected its approach, stymieing a takeover that would have combined two theme-park businesses that were hit by the Covid-19 pandemic. SeaWorld shares fell 3.8% off hours; Cedar Fair dropped 11%.
• Joby Aviation gained 5.6% premarket, after having closed up 27% in the prior session. The developer of an all-electric, five-seat aircraft on Tuesday said it formed a partnership with ANA Holdings to bring aerial ride-sharing services to Japan. Toyota also joined the partnership, with the intention of exploring opportunities such as ground-based transportation.
• Wynn Resorts slipped 1.6% premarket after the casino operator reported a larger-than-expected loss for the recent quarter.
• Cisco Systems ,   Nvidia ,   Fisker ,   Hyatt Hotels ,   Host Hotels & Resorts ,   America’s Car-Mart ,   Star Bulk Carriers  and  Marathon Oil  are due to post results after the close.

Chart of the Day

• The Tokyo Stock Exchange recently unveiled its biggest overhaul in 60 years that includes tougher standards for its top tier, but some foreign investors say the real problem is the entire edifice of corporate management in the country.

Write to James Willhite at james.willhite@wsj.com