Risk rally on as European shares rise for fourth straight session

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* STOXX Europe 600 rises 0.5 percent
* Autos, banks in favour
* Daimler (LSE: 0NXX.L – news) rises after earnings beat
* UniCredit (EUREX: DE000A163206.EX – news) surges after selling stake in online broker
* DNB (LSE: 0O84.L – news) drops, hit by Norway’s oil problem
By Alistair Smout
LONDON, July 12 (Reuters) &ndash