European Central Bank chief Mario Draghi said Saturday that the bank may need to take action to stem the rising euro. "The strengthening of the exchange rate would require monetary stimulus" as long as interest rates are already extremely low, he said. Draghi also said that the ECB "should not be complacent" about extremely low inflation, which many fear could stall Europe's economic rebound. Low inflation, he noted, puts a damper on demand, makes it difficult for troubled economies to make policy adjustments, and makes it tough for businesses and governments to cut their debt burdens. "We could do further easing... and use unconventional measures," he said of ECB policy.