Gold prices have fallen 20% since scaling above the key $2,000 per ounce level in March, as rapid U.S. monetary tightening made non-yielding gold less attractive and boosted the dollar to multi-year peak. The U.S. trade deficit in goods narrowed for a fifth straight month in August amid a decline in imports, which is being driven by slowing domestic demand as the Federal Reserve aggressively tightens monetary policy to tame inflation.