ZBH.SW Zimmer Biomet (SIX) down 13.50% pre-market 13 Jan 2026: what to watch

Pre-market trading shows ZBH.SW stock sliding -13.50% to CHF70.50 on 13 Jan 2026 after a sharp gap down from CHF81.50. We note a one-day drop of CHF11.00 on very light volume (19.00 shares). The move puts Zimmer Biomet below its 50-day average of CHF81.36 and 200-day average of CHF90.42 on the SIX Swiss exchange, prompting renewed focus on fundamentals, technicals, and Meyka AI model forecasts.