Homeowners have a seemingly insatiable 
appetite for information about the housing markets. "Are prices going up How's 
the market Is now a good time to sell" they ask. Research reports and 
newspaper articles provide useful answers, but the information is usually buried 
in economic jargon. What is a "median price" anyway What does "seasonally 
adjusted" mean Does anyone understand "unsold inventory index" 
To help you follow the numbers, here are 
some helpful definitions: 
Median price. An oft-cited 
indicator of the strength and direction of a housing market, a median price is 
the midpoint of all the prices of homes sold in a given area during a specified 
period. Midpoint means half the homes sold for higher prices and half the homes 
sold for lower prices. The median isn't the same as the average, which would be 
calculated by totaling all the prices and dividing by the number of prices. The 
median price can be affected over time by the characteristics and sizes of homes 
sold as well as price trends. For example, if the market shifts from starter 
homes to luxury mansions, the median price will increase even if homes are not 
appreciating in value. 
Seasonally adjusted. Housing 
markets are naturally more active in the spring and summer months because people 
prefer to move during the longer warmer days and between school years. That 
pattern means it's difficult to make meaningful comparisons between results for 
different months or quarters of the same year. To overcome this hazard, 
economists statistically tweak the reported number of homes sold during various 
periods to reflect seasonal variations. The tweaked numbers are denoted as 
"seasonally adjusted."
Price discount. The "price 
discount" is the percentage difference between the seller's initial asking price 
and the actual purchase price of the same home. For example, if a home were 
priced at $200,000 and sold for $190,000, the discount would be 5 percent. Price 
discounts are usually reported as an average for a set of home sale 
transactions. A small percentage, on average, means the market favors sellers, 
while a large average discount signals a buyer's market. 
Unsold inventory index. This 
index, which indicates the pace of the market, is calculated by measuring how 
long it would take for all the homes currently on the market to be sold at the 
current rate of sales. A smaller index is a positive sign for sellers, while a 
higher number is good news for buyers. 
Affordability index. An 
affordability index measures whether a typical family can qualify for a standard 
mortgage to purchase a typical home. A "typical" family is defined as one that 
earns the median income in a given area, and a "typical" home is defined as a 
median-priced single-family house in the same area. An index value of 100 means 
a median-income family has exactly the amount of income needed to purchase a 
median-priced home. A number higher than 100 means the family's income is more 
than adequate, while a number less than 100 means the typical family can't 
afford to buy the typical home.