Perion Network Ltd. (NASDAQ:PERI) shares are tumbling after it reported first-quarter FY24 preliminary results and lowered FY24 guidance.  The company sees revenue of $157 million, up 8% Y/Y (consensus $175.529 million), and adjusted EBITDA of $20 million (-36% Y/Y) in the first quarter. In the first quarter of 2024, the company witnessed a decline in Search Advertising activity, owing to changes in advertising pricing and mechanisms implemented by Microsoft Bing in its Search Distribution marketplace.  Buyback: The company approved an increase to ...