Healthcare stocks fell almost 0.9%, with index heavyweights CSL Ltd CSL.AX and Ramsay Health Care RHC.AX down about 1% and 1.3% respectively. By Archishma Iyer June 16 (Reuters) - Australian shares gave up early gains to end lower on Thursday, as investors fretted over the possibility of a recession after the U.S. central bank delivered its biggest interest rate hike in 28 years to curb soaring inflation. "It is a very precarious time for markets because central banks are walking a thin line between letting inflation run high and allowing economic stimulation."