European stock markets slipped back by the close of a choppy day’s trading after a positive start. It was banks again that led the retreat, though results in the sector were mixed. HSBC, Santander, UBS and Deutsche Bank all gave up earlier gains, although encouraging profits at Credit Suisse pushed its shares up more than 8 percent.BP, Royal Dutch Shell and Total were among the gainers as the price of oil went above 49 dollars a barrel, but crude slipped back by the end too. The euro had some respite on the money markets, strengthening against the US currency to trade at 1 dollar 30. The FTSE in London ended 0.3 percent down, the CAC 40 in Paris lost 0.66 of a percent, and the DAX in Frankfurt closed 1.25 percent off.