Investors will be handed a clue today in to just how aggressive Mario Draghi is willing to be. At 3:30 p.m. in Frankfurt, the European Central Bank will reveal much it spent on covered bonds last week after returning to that market for a third time as part of a renewed bid to stave off deflation. The central bank bought at least 800 million euros ($1 billion) of assets from Portugal to Germany in the three days since the program began on Oct. 20, traders said last week. Formal details will help them divine how quickly the ECB president can reach his target of expanding the institution’s balance sheet by as much as 1 ... (full story)