Greek worries drag euro zone shares to worst weekly fall this year
* Euro STOXX 50 in biggest weekly drop since Dec
* Sunday's Greek referendum a major focus for investors
* Banks under the spotlight after more regulatory issues emerge
* Europe bourses in 2015: link.reuters.com/pap87v
* Asset performance in 2015: link.reuters.com/gap87v
By Alistair Smout and Liisa Tuhkanen
LONDON, July 3 (Reuters) - A top euro zone share index ended Friday with its worst weekly fall this year, as the market was hit by uncertainty over Greece's referendum on its bailout terms, which could determine whether it stays in the single currency.
The blue-chip Euro STOXX 50 index closed down 0.6 percent at 3,441.76 points, marking a weekly fall of around 5 percent, its worst since a 6 percent drop in December.
The FTSEurofirst 300 slipped 0.6 percent while Germany's DAX equity index retreated 0.4 percent. The DAX is now 11 percent below a record high reached in April. Continuación...