Investment bank slump tips C.Suisse to Q4 loss

ZURICH (Reuters) - Credit Suisse posted a surprise fourth-quarter net loss as business at its investment bank slumped and it took almost 1 billion Swiss francs ($1.1 billion) of charges for slashing costs and risky assets to meet tough new capital rules.

"Our performance for the fourth quarter 2011 was disappointing," said Chief Executive Brady Dougan.

"It reflects both the adverse market conditions during the period and the impact of the measures we have taken to swiftly adapt our business to the evolving market and regulatory requirements."

Credit Suisse shares, which had risen 14 percent this year, were down 2.7 percent to 24.54 francs by 1229 GMT, underperforming the European banking sector