0539 GMT - U.S. Treasury yields decline slightly, hand in hand with oil prices, in Asian trade, as investors turn their attention to the Kansas City Federal Reserve's upcoming Jackson Hole symposium following Wednesday's key PCE inflation data. "With core PCE holding at 3.3% year-on-year and the supercore re-accelerating, the pressure on [Fed Chairman Kevin] Warsh to signal a hawkish posture is real--but consensus remains that he will avoid a definitive policy commitment," Danske Bank's Jesper Fjarstedt says in a note. The 10-year Treasury yield falls 1.2 basis points to 4.652%, while the 30-year yield is down 1.3 basis points at 5.171%, according to Tradeweb. Brent oil falls 0.8% to $87.84 per barrel.