Two sources can both be accurate and still disagree, because they are not measuring the same period, the same geography, or the same set of transactions. Some series report monthly and get revised. Some cover the seven county metro area and some cover the city. Some count closings and some count contracts.
These reports state the window and the source behind every figure they use, so a reader can tell whether two numbers actually conflict or simply describe different things.
Every figure on this topic is reported with its source and its measurement window. See how we measure and our editorial standards.
REcolorado's median describes the middle of June's Denver Metro closings and Case-Shiller tracks repeat sales of qualifying existing single-family homes through May, so both readings can be accurate at once.
June closed-price measures remained broadly stable while the newer pending-sales reading suggests softer buyer commitment, and that is not a forecast of falling prices.