Gold prices edged lower on Tuesday, with spot XAU/USD down 0.2% to $4,290.39 an ounce at 02:16 ET (06:16 GMT), after falling more than 1% on Monday to a five-week low. Gold Futures declined 0.5% to $4,330.57, while silver fell 0.2% and platinum rose 0.2%. A 0.2% gain in the U.S. Dollar Index to 99.63, higher Treasury yields and rising oil prices have weighed on bullion ahead of the Federal Reserve’s policy decision. Markets are pricing about a 92% probability of a Fed rate increase this week, as energy costs raise inflation risks and higher borrowing costs make non-interest-bearing gold less attractive. Oil prices rose after Saudi Arabia shut its East-West pipeline following attacks last week, putting millions of barrels a day at risk while the country has not said how long the closure will last. The 10-year U.S. Treasury yield briefly reached 5% on Monday, its highest level in almost three years. Gold is down more than 3% in September after trading above $4,600 an ounce in late August, but longer-term investor demand remains supportive. OCBC raised its precious-metals forecasts and projects gold at $4,600 an ounce by December 2026 and silver at $69.70, citing stronger investment participation and structural demand.