** Shares in Ageas AGES.BR rise around 3% to their highest level since late Aug

** Outperforms STOXX .STOXX index, which falls roughly 1% after U.S. tariff threats over Greenland shook investors

** Expects 2025 net operating income at 1.6 billion euros - 1.65 billion euros ($1.86-1.92 billion) from 1.3 - 1.35 billion euros

** Boost comes from one-off positive tax impact at China JV Taiping Life with China Taiping 0966.HK

** ING notes while one-off, it's "positive" from China amid investor concerns; CEO "very confident" in Chinese earnings progression

** "This could strengthen the cash balance Ageas has in case it needs to bid for Ethias in 2027," it adds

** Barclays forecast 2%-3% gain pre-market on guidance upgrade

($1 = 0.8601 euros)

(Reporting by Mateusz Rabiega)

((mateusz.rabiega@thomsonreuters.com))