tally the loss in the Wall Street

--Citigroup, which yesterday announced a fourth-quarter loss of $9.83 billion, said it would write down the value of certain assets by $18.1 billion. Merrill's fourth-quarter write-downs, to be announced tomorrow, are expected to be nearly $15 billion. --That will push the toll on Wall Street from the current credit crisis past $100 billion in losses, equivalent to 0.7% of gross domestic product. By way of comparison, the total losses from savings and loans and related commercial bank loans from 1986 to 1995 were about $189 billion, or 3.2% of average GDP in that period. S&Ls alone were $153 billion.