Euro zone shares set for biggest weekly fall this year with Greece in focus
* Euro STOXX 50 steady but set for biggest weekly drop since Dec
* Sunday's Greek referendum on bailout a major focus
* Banks under the spotlight after more regulatory issues emerge
By Alistair Smout and Liisa Tuhkanen
LONDON, July 3 (Reuters) - A top euro zone share index was set for its biggest weekly fall this year on Friday, with many investors focusing on a crucial vote in Greece over its debt negotiations at the weekend.
The euro zone Euro STOXX 50 index was on track for its worst week since December. The index was down 0.3 percent at 3,451 points, marking a weekly fall of around 4.4 percent since last Friday.
The FTSEurofirst 300 slipped 0.2 percent, also set for its biggest weekly fall since late April, while Germany's DAX equity index was flat.
European stock markets have been hit by concerns over mounting tensions between Greece and its international creditors since the government in Athens announced a surprise referendum on the terms of a new bailout programme.
Ahead of Sunday's vote -- which could determine the country's future in the euro zone -- the two campaigns are finely balanced, with "Yes" supporters of the bailout terms taking a slight lead in the latest poll. Continuación...