UBS Loses Conviction In Spark Therapeutics, Downgrades By: Benzinga via Benzinga December 12, 2017 at 14:49 PM EST Spark Therapeutics Inc (NASDAQ: ONCE) releasedphase 1/2 SPK-8011 data in hemophilia A treatment over the weekend that fell short ... Read More >> Related Stocks: Ashland Inc Spark Therap UBS Group Ag ADR