On Friday, NASDAQ and the S&P 500 index witnessed a steep weekly
fall in last 4 months due to the slow growth in the global
economy. The losses on the last day of trading gave the S&P 500
index its fourth losing week out of the last five.
The slowdown of the global economy hammered the commodity-
related stocks while the biotech giant Biogen’s financial
earnings report influenced the entire sector to slump down this
week. Biogen, Inc (NASDAQ:BIIB) posts almost half of its revenue
growth forecast for 2015, which resulted in a 22 percent loss of
its stock value to close at $300.03.
http://thenextdigit.com/24477/nasdaq-500-dow-jones-slump-weeks-
expectation/