First Interstate Loss $556 Million

First Interstate Bancorp, the nation’s ninth-largest bank holding concern, today posted losses of $95 million for the fourth quarter and $556.2 million for the year because of write-offs and loan-loss provisions.

In 1986, the Los Angeles-based company netted $54.8 million, or $1.79 per share, for the fourth quarter and $337.9 million, or $7.19 per share, for the year. The 1987 losses were in line with what First Interstate projected a week ago when it announced it was adding $180 million to reserves for possible losses on Latin American loans for the fourth quarter.