ECONODAY: Existing home sales rose more than expected in March, up 5.1 percent to a 5.330 million annualized rate that, however, fails to reverse a downwardly revised 7.3 percent drop in February. And the year-on-year rate, at only 1.5 percent, is decidedly weak. But looking at the first quarter as a whole, which is important for housing data given their volatility, existing home sales are up a much more respectable 4.8 percent...