Would it be worth Trump buying Greenland?

London’s capital market needs a kick in the pants, as I write every week, and ‘activist investors’ are no bad thing if they provoke sharper corporate performance. The assault by the New York hedge funder Boaz Weinstein on seven UK investment trusts – demanding shareholder votes to replace directors with his own people and take the management of the trusts into his own firm, Saba Capital – looks like the kind of intervention that might bring positive change to the UK’s historic investment trust sector, which accounts for a third of FTSE 250 companies but according to critics offers lacklustre...