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 along with a table from Winterflood showing recent aggregate sector movements. If there are trusts you are interested in, the links in the list of news each day will take you to the relevant London Stock Exchange announcement. The percentage figures in this list show the trust's discount/premium to NAV on the day of the announcement. The final table at the bottom of the...