Wall St ends mixed in truncated Black Friday trading

US stocks have ended little changed in holiday-shortened trading, with low volume and conviction as investors watched the start of the seasonal shopping season for signs of consumer resiliency. The S&P 500 closed essentially unchanged while the Dow eked out a modest gain. The Nasdaq was dragged slightly lower by weakness in megacap momentum stocks. All three indexes notched their fourth consecutive weekly gains. “We had mixed macroeconomic data and the post-Thanksgiving session is only half a day, so there aren’t that many participants,” said Peter Cardillo, chief market economist at Spartan Capital Securities in New York. “But we’re seeing…