If deteriorating stock market sentiment turns a corner this week, it's unlikely to be a function of optimistic data. The calendar of events is simply too light to drive a sustainable directional reversal. The schedule in the week ahead includes much Fed-speak, an anecdotal review of economic developments around the country and the Monthly Treasury Budget Statement. Besides those planned releases, Treasury will auction $66 billion in 3-year, 10-year and 30-year debt on Tuesday, Wednesday, and Thursday...