US stocks open mixed as uniQure drops 39% and Summit Therapeutics gains 19.2%

US stocks opened mixed, according to market data cited by ChainCatcher from Gate. At the open, the Dow Jones Industrial Average fell 0.1%, the S&P 500 rose 0.13%, and the Nasdaq gained 0.3%. Among individual names, biotech company uniQure fell 39% after 48-month data for its Huntington’s disease gene therapy failed to reach statistical significance. Summit Therapeutics rose 19.2% after AstraZeneca had proposed a $2 billion investment in the company to jointly develop an anticancer drug. The moves highlighted sharp divergence between the broader US equity benchmarks and select biotech stocks at the open.