** Shares in Swiss Re SRENH.S rise 4.3% after the Swiss reinsurer achieved FY and Q4 results above expectations and announced an additional $1 bln share buyback
** The group recorded its highest ever group net income due to disciplined underwriting, strong investment results and low claims from natural catastrophes in 2025, Vontobel says
** Vontobel sees all three business units are positioned well after the portfolio review of life and health reinsurance was completed
** The company's announcement of a share buyback of an additional $1 bln in 2026 is also a positive surprise, Vontobel and Zuercher Kantonalbank highlight
** A dividend increase of 9% for 2025 is also above forecasts, Vontobel says
(Reporting by Bernadette Hogg)
((bernadette.hogg@thomsonreuters.com))