Credit Suisse Group, emerging from the global financial crisis as one of Europe's strongest banks, said Thursday that second-quarter net profit rose 31% on a healthy showing from its investment bank, while it also cautioned that uneven business conditions for banks are likely to persist.

The Zurich-based bank's net profit for the three months rose to 1.6 billion Swiss francs ($1.5 billion), from CHF1.22 billion a year earlier. The result topped analyst estimates, which averaged CHF1.44 billion.