The Dow Jones Industrial Average opened down 0.1%, the S&P 500 rose 0.1%, and the Nasdaq rose 0.3%.

Soleno Therapeutics rose 32.5%, while Neurocrine Biosciences fell 2.0%. Neurocrine spent $2.9 billion to acquire the company. Netflix rose 1.7%, with Goldman Sachs upgrading its rating from "hold" to "buy." Twilio rose 3.4%, with Jefferies upgrading its rating from "hold" to "buy." Amkor rose 3.9%, with Melius Research upgrading its rating to "buy." Carvana fell 2.4%, with Bank of America downgrading its rating to "neutral."