Metro Denver homebuyers were hit with a one-two punch of both higher mortgage rates and higher home prices last month, unexpected blows that could test their stamina in the weeks ahead, according to a monthly update from the Denver Metro Association of Realtors. “Spring felt like a failure to launch, which has led to a summer kick-off where the natural rhythm of the Denver real estate market simply feels off,” said Libby Levinson-Katz, chairwoman of the DMAR Market Trends Committee, which compiled the report.