Lightwave Logic is trading 5.19% lower at $4.20 in pre-market trading as semiconductor stocks weaken. - No new company-specific announcement explaining the October 22 pre-market move surfaced in the search. - Lam Research shares fell after its outlook drew concerns about supply constraints and China-related revenue, adding sector pressure; major U.S. indexes and chip shares were also lower pre-market. - Lightwave Logic rose 6.49% to $4.43 in the October 21 session.