"Nikola's Stock Surges, Outperforms Market Amid Retail Investor Interest"

Stock futures trade mixed as corporate earnings season begins. Nikola's stock rises 15% after securing additional funding for hydrogen refueling stations. Arista Networks shares jump 15% due to strong Q2 earnings and optimistic Q3 outlook. Emergent BioSolutions shares rise 13% after securing a 10-year contract for Ebola virus treatment. JetBlue shares fall 7% as the airline lowers yearly estimates and issues a weak Q3 outlook. TG Therapeutics stock drops nearly 50% due to increased expenses and widened net loss. ZoomInfo Technologies shares plummet over 27% after lowering FY2023 projection. Rambus shares drop 12% despite stating long-term profitability. Harmonic stock declines 21% after missing revenue expectations.