AT&T Co warns that its fourth quarter 1992 net profit will be reduced by about $0.03 per share as a result of a decline in the value of its investment in Compagnie Industriali Riunite Spa AT&T, which took the shares in exchange for the ones it held in Ing C Olivetti & Co SpA, says the investment is being reduced on its books to a year-end 1992 market value of $63m from the $131m at which it had been valued.
