World shares were mostly lower on Monday in quiet trading ahead of Christmas holidays for many markets. World Shares The S&P 500 rose 0.5% to 3,221.22. It is up 28.5% for the year. The Dow Jones Industrial Average climbed 0.3%, to 28,455.09. The Nasdaq composite added 0.4%, to 8,924.96, while the Russell 2000 index of […]