Roche buying Spark Therapeutics for $4.8 billion
Roche is betting on gene therapies. Photo: Fabrice Coffrini/AFP via Getty Images
Why it matters: Pharmaceutical companies see promise in gene therapies and are willing to pay a large premium for them, but the treatments also come with record-high price tags. Spark has an $850,000 gene therapy to treat a rare eye condition, and a separate product is in the works for hemophilia.