Yesterday's INSM trading volume was almost 1.9M shares. Its price dropped by 10.0% from the previous day's close, a continuation of a drop trend that started earlier in the week. If its short interest also went up significantly for the 10-31-20 short interest not yet reported, it means that borrowed shares were involved in much of the recent selling. If its short interest stayed the same as the 10-15-20 reported short interest (i.e. 11.73 M shares), then either the shorts were covering on the same day(s) they sold, or that INSM pure long shareholders were selling because somehow they were "concerned" about the year over year positive revenue numbers during a virus pandemic. JMHO.