I have done some calculating on when topline data will be presented
The phase 2a data primary completion date was May 8, 2019 and the top line results were reported on Sept 9, 2019 so about 4 months later
The Phase 2B had the last person dosed on January 28, 2020 and the final study measurement is 28 days later so February 26th. adding 4 months to that for analysis of data (same as phase 2a) gets you to about June 26th or thereabouts.
Anybody that wants to exit prior the results should get out by then (probably a week earlier) and anyone wanting to enter should get in by then (or a week earlier for safety). Too bad they don't offer stock options for SAVA or I would handle the risk entirely by buying July call options.