U.S. Stocks Cap Worst Week Since '11 as Oil Drops to 12-Year Low

  • S&P 500 extends losses in final hour of trading as banks fall
  • Treasuries gain most this week since October amid haven demand

Deep Dive: Should Investors Be Spooked?

U.S. stocks capped the worst week since September 2011 and crude tumbled to a 12-year low as the effects of China’s attempts to shore up financial markets faded. Treasuries posted the biggest weekly advance since October.

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