Wall Street rises, Dow racks up seventh straight weekly gain

Wall Street ended the week on a positive note on Friday as investors doubled down on a rally fuelled by optimism that President-elect Donald Trump's policies will boost economic growth. The Dow Jones Industrial Average, which briefly came within striking distance of the historic 20,000 level earlier this week, recorded its seventh straight weekly gain. Following a rally since the Nov. 8 U.S. election, the Dow is up about 14 percent for the year and the S&P 500 is 11 percent higher on bets th