A rise in existing home sales last month shows things are getting better in the U.S. housing market, but the still-dire unemployment situation and the looming possibility of a jobless recovery may halt the rally by the end of the year. That makes the extension of an $8,000 tax credit for first-time homebuyers imperative.

Existing home sales rose 7.2% to a 5.24 million annual rate in July, the most since August 2007 and the fourth straight month the figure increased, the National Association of Realtors (NAR) said Friday. Year-over-year sales grew 5%, the increase since September 2007, just before the markets came crashing down the following month.

“The housing market has decisively turned for the better,” said NAR chief economist Lawrence Yun. “A combination of first-time buyers taking advantage of the housing stimulus tax credit and greatly improved affordability conditions are contributing to higher sales.”

Rising sales numbers