When Credit Suisse kicks off the European leg of the second-quarter earnings season for investment banks on Thursday, attention will focus on how events in Greece have weighed on sales and trading revenues and whether Wall Street's surge in advisory fees has been matched across the Atlantic.

Wall Street banks reported mixed results last week, with traditional investment banking revenues hitting multi-year quarterly highs at JP Morgan and Goldman Sachs on the back of an increase in advisory revenues. But volatility caused sharp losses in some sales and trading arms, with Goldman Sachs reporting a 28% fall in fixed income revenues year-on-year. Morgan Stanley was the only major Wall Street investment bank to post a rise in fixed income revenues, following strong performance in rates and foreign exchange.