http://www.bloomberg.com/news/articles/2016-01-15/u-s-stocks-extend-worst-start-on-record-with-weekly-tumble

http://www.cnbc.com/2016/01/15/fear-is-spiking-but-heres-where-the-bear-is.html

http://finance.yahoo.com/news/plunge-crude-oil-prices-send-122844325.html

http://uk.finance.yahoo.com/news/wall-street-selloff-options-expiration-175453991.html

http://www.bloomberg.com/news/articles/2016-01-15/s-p-500-futures-signal-stock-losses-on-oil-intel-goldman-fall

http://www.chicagobusiness.com/article/20160115/NEWS01/160119881/cme-morningstar-ceos-mull-financial-technology-hub

http://wp.me/p6fy7h-6LPlq

http://wp.me/p6fy7h-6LPli

http://www.automatedtrader.net/news/at/155113/sec-charges-goldman-sachs-with-improper-securities-lending–practices

http://marketsmedia.com/cboe-eyes-new-trading-platform/

http://www.tradersmagazine.com/news/ecns_and_exchanges/traders-q-114869-1.html

http://www.forbes.com/sites/dividendchannel/2016/01/14/notable-thursday-option-activity-bdsi-xom-car/#2715e4857a0b7ecf567f5314