The Rank Group is trading 5.15% down now at £83.56 after saying the machine-games-duty increase would add about £9m to its annual tax bill before mitigation. - On October 29, it said £2m of the impact would fall in its current financial year. - It maintained its like-for-like operating profit expectation and plans to outline mitigation alongside half-year results on January 28. - The warning followed the previous day's rally, as investors welcomed a smaller-than-feared tax rise.