CVB Financial Corp's stock plunged 46.83% in pre-market trading on Thursday, following the release of its fourth-quarter earnings results.

The bank holding company reported earnings of $0.36 per share for Q4 2024, which surpassed Wall Street expectations of $0.34 per share. However, its revenue for the quarter declined 10.8% year-over-year to $123.5 million, missing analysts' estimates of $128.07 million.

While CVB Financial's net interest margin improved to 3.2% from the expected 3.1%, the company's efficiency ratio of 47.3% was higher than the anticipated 46.5%, indicating a less efficient operation. Additionally, its total interest-earning assets and noninterest income fell short of analysts' expectations.