Dollar up, gold above $3300, boosted by trade optimism before Fed decision.

On Tuesday, as investors waited for the Federal Reserve's interest rate decision, a series of important economic data, and the outcome of US trade negotiations, the US dollar index continued to rise, reaching a five week high at 99 during trading and ultimately closing up 0.26% at 98.89. US Treasury yields collectively fell, with the benchmark 10-year yield closing at 4.326% and the 2-year yield closing at 3.875%. On Tuesday (July 29th), the gold price fluctuated and rebounded, with spot gold hitting a high of $3333.93 per ounce during trading and ultimately closing at $3326.35 per ounce, an increase of about 0.36%. This rebound occurred after the gold price plummeted to around $3302 on Monday (the lowest point since July 9th), indicating a rapid shift in market sentiment. Behind this drastic fluctuation is the struggle of multiple key factors: the upcoming Federal Reserve interest rate decision, the crucial stage of China US trade negotiations, and the fluctuating global risk aversion. Due to Trump's increased pressure on Russia to reach a peace agreement and signs of easing in the global trade situation, international crude oil prices have risen significantly. WTI crude oil surged 4% at one point and ultimately closed up 3.31% at $68.878 per barrel, marking the largest daily increase since June 17th; Brent crude oil once reached the $70 mark and ultimately closed up 3.14% at $71.61 per barrel.