John Monckton, 49, a managing director of bonds at L&G Investment Management, was knifed in his Chelsea home by two youths.
He was one of the top three figures in the corporate bond market, managing assets of more than £26bn. He has worked at L&G since 1996.
Earlier last week, Alistair Wilson, a 30-year-old new business manager at Bank of Scotland, was shot dead on the doorstep of his home in Nairn, Inverness-shire having just put his children to bed. Wilson worked for BoS at the Inverness Business Centre.
Originally from Ayrshire, Wilson joined the bank in 1996 as an accountancy and business law graduate and started in Fort William branch, before moving to the PFI and specialist lending sections in Edinburgh.