http://www.cboeoptionshub.com/2015/12/21/weekly-market-outlook-reasons-for-caution-here/

http://www.chicagobusiness.com/article/20151221/NEWS01/151219820/why-are-cme-seats-falling-in-value

http://www.bloomberg.com/news/articles/2015-12-21/indian-bank-call-options-rise-with-hedging-costs-at-one-year-low

http://www.marketwatch.com/story/a-triple-digit-dow-plunge-friday-will-set-mark-for-most-volatile-december-since-2008-2015-12-18

http://www.bloomberg.com/news/articles/2015-12-21/the-big-short-was-only-one-reason-2015-was-the-year-of-the-bears

http://www.reuters.com/article/us-usa-stocks-idUSKBN0U11JM20151219

http://blogs.wsj.com/moneybeat/2015/12/20/volatility-returns-to-stocks-as-fed-raises-rates/

http://www.bloomberg.com/news/articles/2015-12-18/china-to-stress-test-securities-firms-after-stock-market-slump

http://www.natlawreview.com/article/sec-proposes-new-rule-governing-funds-use-derivatives

http://www.barrons.com/articles/the-vix-comes-into-its-own-1450511065

http://www.reuters.com/article/us-usa-stocks-weekahead-idUSKBN0U12F520151218

http://www.bloomberg.com/news/articles/2015-12-18/u-s-futures-little-changed-after-s-p-500-ended-fed-fueled-rally