Zillow Group Inc. shares fell 8% in post-market trading Wednesday after the company's second-quarter profit outlook missed Wall Street expectations, wiping out gains from an otherwise upbeat first quarter. The selloff underscores how investors prioritize forward-looking guidance over past performance, even when quarterly results exceed estimates.

The profit miss overshadowed what appears to have been solid first-quarter results, suggesting analysts had baked in higher expectations for the months ahead. Real estate tech companies face heightened scrutiny as mortgage rates and housing market volatility impact consumer demand. Zillow's guidance failure signals potential headwinds the company sees coming in its core listings and home-buying businesses.

The after-hours decline reflects investor disappointment with the company's trajectory heading into the seasonally stronger summer housing market. The 8% drop indicates traders are reworking their valuations based on the weakened Q2 outlook.