Friday ended a successful week for the stock market, as investors who chose not to take the day off for Black Friday shopping helped send major market benchmarks to fresh new all-time record highs. Gains of about a third of a percentage point for the Dow and S&P 500 added to their record runs earlier in the week, and investors didn’t see anything in the early results from the beginning of the holiday shopping season to justify reversing the positive momentum that stocks have seen lately.