AMRN's big news hit Sept 24th, but in terms of days to cover the short position was smaller.....From July to Sept the days to cover only grew from 1.4 days to 3.2 days.  RVX by my best guesstimate is already over 4 days, and possibly even higher if the 350K odd short number does not include shares shorted OTC in the states.

Here's the table:

https://www.nasdaq.com/symbol/amrn/short-interest