Krystal Biotech (KRYS) rocketed to a record high Monday after its gene therapy showed promise as a skin disease treatment. In midday trading on the stock market today, Krystal stock soared 30.9%, near 20.50. Earlier, Krystal popped as much as 37.6% in higher-than-average volume. Krystal stock began trading around 10 in September 2017.