This is our weekly roundup of investment trust announcements, movers, and forthcoming dividend and ex-dividend dates.  The tables with the week's biggest gainers, losers and discount changes, courtesy of Numis Securities follow. Most of the usual data from Winterflood and Buchanan is unavailable this week due to the festive break, but this information will return in the new year. The final table at the bottom of the article from Winterflood shows upcoming dividend payments. Please note that the charts and weekly and year-to-date performance data were correct as of Friday morning.

The Winterfl...