A bumpy day on Wall Street ends with stock indexes mixed

The SP 500 rose 13.89 points, or 0.4%, to 3,855.36 as gains for influential Big Tech stocks were big enough to steady the index and return it to a record. It recovered from a 1.2% loss earlier in the day, as investors expect Apple and other tech giants to report healthy profits for the end of 2020 in coming days....