Continued concerns about the global economy weighed the markets down to a lower open with the Dow tumbling 98 points to 16,042. Nasdaq dropped 30 points to 4,184.

On the upside

Chesapeake Energy (NYSE: CHK) will sell certain drilling assets to Southwestern Energy for approximately $5.38 billion.

Shares of virus detection maker OraSure Technologies (Nasdaq: OSUR) climbed as a second healthcare worker tested positive for Ebola.

ITT Educational Services (NYSE: ESI) will host a conference call tomorrow, October 17, to discuss 2013 results as well as 2014 second and third quarter results.

On the downside

Netflix (Nasdaq: NFLX) reported higher third quarter earnings but subscriber growth fell far short of analyst expectations

Extreme Networks (Nasdaq: EXTR) reported preliminary first quarter earnings and revenue that missed expectations by a wide margin.

Baker Hughes (NYSE: BHI) reported higher third quarter earnings and revenue but the results fell short of estimates.

In the broad market, declining issues outpaced advancers by a margin of more than 5 to 2 on the NYSE and by nearly 5 to 3 on Nasdaq. The broader S&P 500 tumbled 15 points to 1846. Bitcoin lost $13 to $376.