US existing home sales fall

US economic data on Monday were mixed.

Existing home sales fell 1.2 percent in June. With the inventory of unsold homes rising 1.9 percent, the months' supply rose to 5.2.

Nevertheless, the median price for a previously-owned home jumped 13.5 percent from a year ago to $214,200, the highest since June 2008.

The US economy as a whole may have improved. The Chicago Fed National Activity Index rose to -0.13 in June from -0.29 in May. The three-month average rose to -0.26 from -0.37, suggesting that growth remained below historical trend.