By Sarah Turner
LONDON (MarketWatch) -- European shares Tuesday couldn't extend a recent run of gains to 10 sessions. Banks were weighing, with BNP Paribas (FR:BNP 49.32, -1.00, -1.99%) shares down 2.3% after rating agency Fitch cut its long-term credit rating a notch to AA- late Monday. Rival Societe Generale (FR:GLE 37.49, -1.41, -3.61%) shares fell 2.7% and Barclays (UK:BARC 311.20, -5.95, -1.88%) shares were down 1.6%. The U.K. FTSE 100 index lost 0.7% to 5,260.06, the German DAX index declined 0.3% to 6,276.48 and the French CAC-40 index declined 0.8% to 3,706.98.