Equifax (EFX) shares plummeted 6.02% in pre-market trading on Tuesday, despite the company reporting better-than-expected second-quarter results. The sharp decline reflects investor disappointment with the credit bureau's cautious outlook for the remainder of the year.

For the second quarter, Equifax posted adjusted earnings per share of $2, surpassing the analyst consensus estimate of $1.92. Revenue also beat expectations, coming in at $1.537 billion compared to the projected $1.512 billion. Despite these positive results, the company's forward guidance has raised concerns among investors and analysts.

While Equifax marginally raised its full-year revenue forecast to a range of $5.97 billion to $6.04 billion, up from the previous $5.91 billion to $6.03 billion, the outlook for the second half of the year fell short of market expectations. Oppenheimer analyst Owen Lau noted that this disappointment could be a key focus during the earnings call, questioning whether the lower outlook stems from underlying business challenges or management conservatism.

The company continues to face headwinds in the mortgage market, with suppressed loan demand amid rising Treasury yields and economic uncertainties. Despite a smaller-than-expected 8% decline in mortgage inquiries during Q2, the ongoing challenges in this sector may be contributing to the cautious stance. As investors weigh these factors, the pre-market plunge suggests a significant reassessment of Equifax's near-term growth prospects.