Holcim, the Swiss cement firm, has turned to Credit Suisse First Boston (CSFB) and SG to run a convertible bond despite using UBS Warburg for its rights issue last year.

UBS was the sole bookrunner of Holcim's Sfr490m (€335m) rights issue in June 2001, according to Dealogic, the investment banking research firm. CSFB was one of the three co-managers.