The uptrend in existing-home sales continues, with January sales rising for the third consecutive month with a pace that is now above year-ago levels, according to the National Association of REALTORS.

Existing-home sales, which are completed transactions that include single-family, townhomes, condominiums and co-ops, increased 2.7 percent to a seasonally adjusted annual rate of 5.36 million in January from a downwardly revised 5.22 million in December, and are 5.3 percent above the 5.09 million level in January 2010. This is the first time in seven months that sales activity was higher than a year earlier.

Lawrence Yun, NAR chief economist, said the improvement is good but could be better. “The uptrend in home sales is consistent with improvements in the economy and jobs, which are helping boost consumer confidence,” Yun said. “The extremely favorable housing affordability conditions are a big factor, but buyers have been constrained by unnecessarily tight credit. As a result, there are abnormally high levels of all-cash purchases, along with rising investor activity.”

A parallel NAR practitioner survey shows first-time buyers purchased 29 percent of homes in January, down from 33 percent in December and 40 percent in January 2010 when an extended tax credit was in place.

Investors accounted for 23 percent of purchases in January, up from 20 percent in December and 17 percent in January 2010; the balance of sales were to repeat buyers. All-cash sales rose to 32 percent in January from 29 percent in December and 26 percent in January 2010.

“Increases in all-cash transactions, the investor market share and distressed home sales all go hand-in-hand. With tight credit standards, it’s not surprising to see so much activity where cash is king and investors are taking advantage of conditions to purchase undervalued homes,” Yun said.

All-cash purchases are at the highest level since NAR started measuring these purchases monthly in October 2008, when they accounted for 15 percent of the market. The average of all-cash deals was 20 percent in 2009, rising to 28 percent last year.

The national median existing-home price for all housing types was $158,800 in January, down 3.7 percent from January 2010. Distressed homes edged up to a 37 percent market share in January from 36 percent in December; it was 38 percent in January 2010.

Total housing inventory at the end of January fell 5.1 percent to 3.38 million existing homes available for sale, which represents a 7.6-month supply at the current sales pace, down from an 8.2-month supply in December. The inventory supply is at the lowest level since December 2009 when there was a 7.3-month supply.