OBSN.SW ObsEva S.A. (SIX) drops to CHF 0.0012 on heavy volume 27 Jan 2026: liquidity risk ahead

OBSN.SW stock plunged to CHF 0.0012 intraday on 27 Jan 2026 on volume 2,351,202, making it one of the most active names on SIX. The move follows a sharp monthly slide of -76.92% and a year-to-date drop of -96.63%, pressuring liquidity for ObsEva S.A. in Switzerland. Traders are pricing scarce float and weak sentiment into the share while the company remains a small-cap biotech with ongoing clinical-stage programs. We break down the intraday drivers, fundamentals, technicals, Meyka AI grade, and near-term outlook