The number of investment bankers in Europe at Credit Suisse First Boston will this week fall to less than half the number when the bank acquired Donaldson, Lufkin & Jenrette in 2000, after its latest round of job cuts.

CSFB will cut 90 European investment banking jobs this week, according to sources close to the firm, as part of a redundancy programme initiated a month ago. CSFB declined to comment.