Oil slump leads to Wall Street's worst week in two years

US stocks fell sharply on Friday, leaving the benchmark S&P 500 with its worst weekly performance since May 2012, as investors pulled back from the markets in response to oil’s free-fall and more weak data out of China.

Oil’s declines have underscored concerns about global demand, and with the S&P 500 having hit a record high only last week, investors were loath to fight the downward pressure on stocks, which accelerated in the final minutes of trading. The S&P dropped 3.5 per cent on the week after seven straight weeks of gains.