On Monday, US stocks rose.br AstraZeneca said its COVID-19 vaccine candidate demonstrated an average efficacy rate of 70.br This is the third COVID-19 vaccine said to have surpassed the Food and Drug Administration's requirement of 50 effectiveness.br S&P 500: 3,580.82, up 0.7br Dow Jones industrial average: 29,473.41, up 0.7 (210 points)br Nasdaq composite: 11,929.04, up 0.