CoStar Group's stock experienced a significant pre-market plunge of 6.19% on Wednesday, continuing a downward trend from the previous session.

The sharp decline follows the company's recent fourth-quarter earnings report, which included first-quarter guidance that fell short of analyst expectations. The disappointing outlook, coupled with plans to ramp up spending on its Homes.com residential expansion and new artificial intelligence initiatives, has raised concerns about near-term profitability and pressured investor sentiment.

Adding to the selling pressure, multiple Wall Street firms have slashed their price targets on CoStar. Analysts from RBC Capital, Deutsche Bank, JPMorgan, Wells Fargo, and Needham are among those who have reduced their targets, citing the weak guidance and concerns over margin pressure from increased investment spending.