The euro will be at $0.80 by the end of 2017, losing a quarter of its value from current levels and setting new lows, say Goldman Sachs GS +1.81% analysts. No it won’t. The euro will appreciate around 15% to $1.20 over the same period, say HSBC 'sHSBC +2.54% economists. These forecasts may be at opposite extremes of the current consensus, which is broadly for more euro weakness from $1.06 where it trades now. But they’re both built on solid arguments. Which to believe depends on what your outlook is for how the global economy shapes up. The Goldman Sachs view is based on expectations that U.S. monetary policy will ... (full story)