Biogen

• Apple stock was downgraded to sell due to anticipated declines in iPhone sales.

• Intuitive Surgical's stock dropped after HCA Healthcare reduced its earnings outlook. $Intuitive Surgical(ISRG.US)

• Software stocks declined following $IBM(IBM.US)'s weaker-than-expected Q2 results.

• $Uber Tech(UBER.US) decreased amid news of advanced acquisition negotiations with Delivery Hero.

• Netflix faces challenges as it prepares to release its second-quarter results. $Netflix(NFLX.US)

• Biogen's stock dipped due to uncertainties surrounding its Alzheimer's treatment breakthrough.

• Some semiconductor stocks remain stable despite market volatility.