The eurozone is "untenable" in its current form and cannot survive unless countries are prepared to cede sovereignty and become a "United States of Europe", the world's biggest bond investor has warned. The Pacific Investment Management Company (Pimco) said that while the bloc was likely to stay together in the medium term, with Greece remaining in the eurozone, the single currency could not survive if countries did not move closer together. Persistently weak growth in the eurozone had led to voter unrest and the rise of populist parties such as Podemos in Spain, Syriza in Greece, and Front National in France, ... (full story)