New York gold futures rise 2.2% to $4,512.50/oz

Gold prices extend gains in early U.S. trade, supported by a weaker dollar and as Treasury yields decline from multi-year highs. New York futures are up 2.4% to $4,522.30 a troy ounce, while the U.S. dollar index is down 0.6% to 99.01, making dollar-denominated commodities cheaper for holders of ot…