In New York, the Dow Jones industrial average was up 79.73 points at 48,442.41. The S&P 500 index gained 31.30 points at 6,909.79, while the Nasdaq composite rose 133.01 points at 23,561.84. The S&P 500 surpassed the record set earlier in December.Brent Joyce, chief investment strategist at BMO Private Wealth, said it appears markets are seeing a Santa Claus rally heading into the end of the year.“It is an odd phenomenon that we get leading into the last few days, heading into the holidays that markets are ...