Mercer International is trading 19.87% lower at $0.16 after a Bloomberg report said the pulp producer is preparing for a potential Chapter 11 filing. - A filing could come in the coming weeks, but plans are not final and could change; no filing is confirmed. - Rising fiber and energy costs and persistent cash burn were cited as pressures. - A separate report described shares down 22.1% pre-market; the supplied live price context shows the current move.