Italian cement and concrete group Buzzi Unicem is reportedly considering a private placement on US markets of a $165m bond, in three tranches maturing in three, five and seven years.  According to sector sources, the plan is only under consideration at the moment. Merrill Lynch is advising the group. Italian white goods producer Merloni successfully launched a private bond placement on the US market several months ago, the first Italian placement after the collapse of food group Parmalat at the end of last year raised concerns over the credibility of Italian corporate bonds.