Greek fears aid German debt sale; Spain the big test

LONDON (Reuters) - Investors sought refuge in short-term German debt on Wednesday as Greece and its creditors met in a fresh attempt to stave off a messy default, while ample European Central Bank cash helped a Portuguese bill sale. Nearly half trillion euros in three-year ECB loans to banks have eased sales of short-dated euro zone debt in recent weeks but the year's biggest test so far comes on Thursday when Spain seeks to sell bonds with maturities up to 10 years. Germany saw the strongest demand for its two-year paper in more than six months, even though it offered rock-bottom returns. ...