The yield on the benchmark 10-year Treasury note edged lower to 4.115% early on Monday. U.S. stock futures were set to start the week in the red, putting the so-called Santa Claus rally at risk. Silver prices were volatile, hitting new highs before giving back some gains. Dow Jones Industrial Average futures were down 27 points, or 0.1%. S&P 500 futures were falling 0.2% and Nasdaq 100 futures were losing 0.4%. The S&P 500 is up 0.2% since the Santa Claus rally period — which includes the final five trading ...