Your Certified Mortgage Planner — Michael Eiden, Mortgage Blogger

The Pending Home Sales Index rose slightly in December, climbing 1 percent from November.

A Pending Home Sale is a home that is under contract to sell, but not yet sold. It’s a figure compiled by the National Association of Realtors® using sales data from over 100 regional listing services and more than 60 large brokerages around the country.

Because each pending sale is a true measure of sales activity, the Pending Home Sales Index is purported to be the most reliable forward-looking indicator for housing. 

Recent data supports this hypothesis.

After Pending Home Sales plunged 16 percent in November, Existing Home Sales fell by 17 percent in December.  Based on the most recent Pending Sales Index, therefore, we can expect January’s closed sales to be similarly level.

For home buyers , this is all a bit of good news. Home prices are based on the supply-and-demand balance that exists between buyers and sellers.  When buyers outnumber sellers, like they did through most of 2009, home supplies dip and, in fact, the national home inventory nearly halved during the 12 months ending November 2009.

With fewer homes for sale, multiple-offer situations were almost commonplace and home values rose as result.

Activity has since slowed, however, and fewer buyers are in today’s market. The supply-and-demand equation has shifted back some. In December, home supplies rose for the first time in 7 months and January will likely show the same.

The net result: Home buyers have more homes from which to choose and that can create negotiation leverage for better prices and better concessions.

With mortgage rates still low and a looming deadline on the homebuyer’s tax credit, market activity should be strong between now and April.   Take your time and bid right. And when you’re ready, be ready. The best deals likely won’t last.

Just one month after from blowing away Wall Street, December’s Existing Home Sales hit the skids, shedding nearly 17 percent and falling to a 4-month low.

Don’t be alarmed, though. The plunge was expected. And not just because Pending Home Sales cratered last month.

When November’s Existing Home Sales surged, it was clear to observers that an expiring $8,000 federal tax credit was the catalyst. At the time, the tax program was slated to expire November 30 and the looming deadline pushed a lot of would-be buyers in Beaverton from a December time frame into November.

The expiration date has a cannibalizing effect on December’s sales figures. It was only later that Congress extended the tax credit to June 30, 2010.

So, with home sales plunging in December, it’s no surprise that home supplies rose for the first time in 9 months.  Home Supply is calculating by dividing the number of homes for sale by the current sales pace.

The national housing supply now rests at 7.2 months.

Despite December’s Existing Home Sales report appearing shaky, it’s actually terrific new for home buyers.

See, for the past few months, as housing has been improving, sellers nationwide have been bombarded by messages of “hot markets” and rising home prices by the media.  Psychologically, a seller is more likely to hold firm on price if he believes the housing market is improving and now December’s data is deflating that argument.

This is why we say there’s always two sides to a housing story — the buyers’ side and the sellers’ side. And, usually, what’s good for one party is bad for the other. It’s what we’re seeing now.

Because of soft data like December’s Existing Home Sales, buyers may retake some negotiation leverage that’s been lost since Spring 2009, helping to improve home affordability and, perhaps, spur more sales.