Nearly one in three staff at Credit Suisse's investment bank suffered a more than 50% fall in their annual bonus in 2015 as the Swiss group cut the bonus pools by more than 30% at its global markets, investment banking and capital markets businesses.

The Swiss bank said in its annual report for 2015 published on March 24 the lower bonus pools at its global markets - or sales and trading - and investment banking and capital markets divisions reflected the units' "weak performance", particularly in the fourth quarter.