HypoVereinsbank has named Hans-Werner Sinn to its supervisory board to replace Eberhard Martini who resigned in October amid a DM3.5bn (€1.8bn) real estate scandal. Sinn will sit alongside DaimlerChrysler chief executive, Juergen Schrempp, and BASF deputy chief executive, Max Dietrich Kley, on the 20-strong board. Sinn has been president of the Munich-based Ifo economic research institute since February last year. Martin International Securities, a newly formed subsidiary of Trio Holdings, has appointed Tim Sparkes as managing director. MIS will specialise in broking eurobonds, asset swaps and credit derivatives. Sparkes brings his own team of nine traders from Tullet & Tokyo. They will focus particularly on euro- denominated eurobonds. Franklin (Fritz) Hobbs will step down in March as chairman of UBS-owned Warburg Dillon Read. Markus Granziol, currently chief executive, will assume the role of chairman on Hobbs' departure as well as continuing as chief executive. Granziol will work closely with Ken Costa and Sir Leon Brittan, Warburg's two vice-chairmen. Hobbs, a silver medal winner from the 1972 Olympics when he was part of the US crew team, became chairman in March 1998 following the early retirement of Hans de Gier. The 53-year-old has been with the firm - which will change its name to UBS Warburg in the first half of this year - for 27 years and held many roles, including global head of corporate finance.