"Berkshire Hathaway operating earnings drop more than expected as Buffett warns of tariff uncertainty" - <a href="https://www.cnbc.com/2025/05/03/berkshire-hathaway-brka-earnings-q1-2025.html" rel="nofollow">https://www.cnbc.com/2025/05/03/berkshire-hathaway-brka-earn...</a>