The European Central Bank is less than one-third of the way into a program to pump more than $1 trillion into the eurozone economy, but it already faces pressure to do more amid global growth concerns, volatile financial markets and the sharp decline in oil prices. Since the stimulus decision was made in January, much has changed in the global economy. China isn't growing as fast as expected and other emerging markets face struggles. The timing of rate increases in the U.S. and U.K. is less certain. The euro, which fell sharply in anticipation of ECB stimulus, has strengthened recently. These forces will make it ... (full story)