|
PAGE
INDEX : What
is it? | The
Problem with Averages | Defining
the "Typical Home" | Understanding
HPI reports.
The Real Estate Board of Greater Vancouver tracks home sales in Greater Vancouver using the Housing Price Index, a statistical tool. The HPI helps home buyers ensure they're getting the best value on their home purchase by comparing today's benchmark typical prices with past prices.
What
is the Housing Price Index?
The
Housing Price Index (HPI) is an alternative measure of real estate
prices that provides a clearer picture of market trends over traditional
tools such as mean or median average prices.
|
What
is a mean average?
The average price is obtained by dividing the total dollar
volume of sales by the number of sales.
|
|
What
is a median average?
To
obtain a median price, all of the sales prices are arrayed
in numeric order. In the case of an even number of sales,
the median is the highest price in the lower half of the group.
If there is an odd number of sales, the midpoint sale is taken
as the median.
|
The HPI concept
is modeled after the Consumer Price Index (CPI), which measures
the rate of price change for a "basket" of goods and services.
Basket is defined as the combination of goods and services that
Canadians buy most such as food, shelter, clothing, transportation,
etc.
Instead of
measuring goods and services, the HPI measures the change in price
for a basket of housing features Greater Vancouverites buy most
such as lot size, number of rooms, age of the home, the neighbourhood,
etc.
[Top
of Page]
The
Problem with Averages
Before the
HPI was introduced in 1997, REALTORS® and the public relied on monthly
average pricing statistics to understand trends in housing prices.
Averages, however, can be very misleading since the quantity and
quality of the properties sold in any given area change over time
for any number of reasons. As a result, average prices can fluctuate
dramatically, making the housing market appear unstable.
To demonstrate
this point, lets look a couple of examples of how average
prices are affected by various changes in sales patterns.
Example 1:
How mean averages are affected by price changes
|
Sale
Prices for Year 1 in dollars
1. 139,000
2. 145,000
3.
230,000
4.
265,000
5.
290,000 median average
6.
320,000
7.
365,000
8.
425,000
9.
480,000
Total $2,659,000
÷ 9 sales = $295,444, which is the
mean average
|
Sale
Prices for Year 2 in dollars
2. 139,000
2.
145,000
3.
230,000
4.
265,000
5.
290,000 median average
6.
320,000
7.
365,000
8. *545,000
9. *580,000
Total $2,879,000
÷ 9 sales = $319,888, which is the
mean average
*price
change from Year 1
|
|
In this
example, the mean average increased by 7.7 percent while the
median average stayed the same. This shows that price changes
at either end of the price scale affect the mean average,
but can leave the median average virtually unchanged.
|
[Top
of Page]
Example 2:
How median averages are affected by price changes
|
Sale
Prices for Year 1 in dollars
1. 139,000
2.
145,000
3.
230,000
4.
265,000
5.
290,000 median average
6.
320,000
7.
365,000
8.
425,000
9.
480,000
Total $2,659,000
÷ 9 sales = $295,444, which is the mean
average
|
Sale
Prices for Year 2 in dollars
1. 139,000
2.
145,000
3.
230,000
4. *290,000
5.
*320,000 median average
6. *335,000
7. *395,000
8. *400,000
9.
*405,000
Total $2,659,000
÷ 9 sales = $295,444, which is the
mean average
*price
change from Year 1
|
|
In this
example, the mean average stayed the same while the median
average increased by 9.4 percent. This shows that price
changes in the mid-range section of the price scale affect
the median average, but can leave the mean average virtually
unchanged.
|
The above examples
reveal that the spread of prices can create wide variances in both
mean and median prices. Price changes at either end of the price
scale affect the mean average; whereas, price changes in the mid-range
section of the price scale affect the median average.
Neither of
these price measurements take into account the changes in buying
pattern In year one luxury homes in the region are popular;
the following year more modestly priced homes are popular. Both
methods of price tracking can have the effect of overestimating
the market price that home buyers are actually paying for their
homes.
[Top
of Page]
Defining
the "Typical Home"
The
Housing Price Index is a more stable price indicator than average
prices, because it tracks movement of "middle-of-the-range"
or "typical" homes and excludes the extreme high-end and
low-end properties. Typical homes are defined by the average home
features sold in Greater Vancouver communities. These features together
become the "benchmark" house, townhouse or apartment in
a given area. A benchmark property is designed to represent a typical
residential property in a particular HPI housing market, such as
Richmond or North Vancouver.
For example,
perhaps the basket of features for a typical home in a given community
includes a 10-year-old, 3-bedroom house on a 7,200 sq. ft. lot,
with 8 rooms, 2 bathrooms, a fireplace and a 1-car garage. A benchmark
price for this home can be created from the individual dollar values
given to each of the above features.
The breakdown
of each months real estate sales in a given area are estimates
of current prices paid for bedrooms, bathrooms, fireplaces, etc.
Prices for these features are then applied to the typical house
model and an index price is estimated for that month. This type
of pricing model involves estimating the price of a propertys
features rather than the property itself.
An important
note: The HPI offers only a benchmark in which to track price trends
and consumers should be careful not to misinterpret index figures
as actual prices. Benchmark properties are considered average properties
in a given community and do not reflect any one particular property.
[Top
of Page]
Understanding
HPI reports
Once
key HPI concepts are grasped, reading online HPI
reports can provide homebuyers with a clearer picture
of housing price trends and help them determine if the price of
their dream home is a good deal. Homebuyers interested in obtaining
a more in depth knowledge
of how the Housing Price Index works can read HPI
formulas for Buyers.
[Top
of Page]
|