Are home prices going up or down? Before you can make sense of the answer, you need to ask another question: compared with when?
Media coverage about home prices can be confusing. Much of that confusion comes from the data being used and the part of the story a headline chooses to emphasize.
Two common ways to measure home price changes are year-over-year and month-over-month. Both are useful. But they cover different time frames, so they can tell different stories without either comparison being wrong.
If you are buying or selling a home, understanding that difference can help you look past a headline and ask better questions.
What Does Year-Over-Year Mean?
A year-over-year comparison, often shortened to Y-O-Y, measures home prices against the same month or quarter in the previous year.
For example, an April year-over-year comparison looks at home prices in April versus prices in April of the previous year. It does not compare April with March.
This approach focuses on changes over a full year. It provides a broader view of the price trend than a comparison covering just one month.
Year-over-year comparisons are useful for evaluating annual growth and determining whether prices are generally appreciating or depreciating. In plain English, appreciation means prices are rising, while depreciation means they are falling.
The Question It Answers
Are home prices higher or lower than they were at the same time last year?
That is an important question. But it is not the same as asking whether prices rose or fell in the most recent month.
When you read a year-over-year figure, keep that distinction in mind. The comparison describes the difference between two points a year apart, rather than just the latest movement.
What Does Month-Over-Month Mean?
A month-over-month comparison, often shortened to M-O-M, measures the change in home prices from one month to the next.
For example, an April month-over-month comparison looks at April prices versus March prices.
This gives you a more immediate snapshot of short-term movements and price fluctuations. Instead of looking back a full year, it focuses on what changed between consecutive months.
Month-over-month comparisons are often used to track immediate shifts in supply and demand, seasonal trends, or the effects of specific events on the housing market.
The Question It Answers
Did home prices rise or fall compared with the previous month?
That makes this comparison useful when you want to understand the market's more recent direction. Its purpose is different from the broader annual view provided by year-over-year data.
How Prices Can Be Down and Up at the Same Time
Here is where headlines can get confusing: home prices can be lower than they were a year earlier while also rising from the previous month.
Those statements do not contradict each other. They simply use different starting points.
Consider this situation:
- Home prices reach a high point.
- Prices decline over several months.
- Prices then begin rising from one month to the next.
- Even after those increases, prices remain below the high point from a year earlier.
In that situation, the year-over-year comparison shows a decline. Meanwhile, the month-over-month comparison shows an increase.
A headline saying home prices are falling could accurately describe the annual comparison. But a reader might take it to mean prices are continuing to fall each month.
That is why the comparison period matters as much as the direction of the change.
Why the Starting Point Matters
A year-over-year comparison can look especially negative when the earlier period was a price peak.
If prices in the comparison month were unusually strong, prices a year later might not measure up. The resulting annual decline may draw attention even when the more recent monthly trend is moving upward.
This does not make the annual comparison inaccurate. It means you need to understand what it is measuring.
Likewise, a monthly increase does not erase an annual decline. It tells you that prices rose over the shorter period, not that they have necessarily returned to their earlier peak.
Looking at both comparisons gives you the broader annual picture and the more immediate monthly picture. Each serves a different purpose.
What About “Buying at the Bottom”?
The original buying argument behind this distinction is straightforward: if prices have fallen from a previous peak and are beginning to recover, a buyer may have an opportunity to purchase below that earlier price level, before further increases.
That is the idea behind the phrase “buying at the bottom.”
But keep the condition attached to that idea. A price below the previous year's peak and a recent monthly increase describe a comparison and a movement. They should not be presented as a promise that prices will keep climbing.
Instead of treating a headline as a signal to rush, use it as a reason to examine the numbers more closely.
What to Check Before Reacting to a Headline
Whether you are considering a purchase or a sale, start with a few practical questions:
- Which comparison is being used? Is the headline discussing year-over-year or month-over-month changes?
- What periods are being compared? Look for the actual months or quarters behind the statement.
- Was the earlier period a peak? That helps explain why an annual comparison might look particularly negative.
- What does the other comparison show? If the story focuses on annual declines, ask about the monthly trend. If it emphasizes monthly gains, ask about the annual picture.
You do not have to choose one measurement and ignore the other. The goal is to understand what each number says, and what it does not say.
The Bottom Line
Year-over-year data shows how prices compare with the same period a year earlier. Month-over-month data shows how prices changed from the previous month. Both matter, and neither should be mistaken for the other.
Before making a move, take a home price headline you have questions about and identify its comparison period. Then reach out to Ed Parcaut to talk through your homebuying questions and mortgage next steps, and connect with a local real estate agent for help understanding home prices.
