http://www.investing.com/analysis/oil–gold-vs-oil–gold-volatility-indices-200307186

http://www.investing.com/news/economy-news/top-5-things-to-know-in-the-market-on-friday-1405169

http://www.marketwatch.com/story/guess-which-of-these-sp-500-valuation-measures-is-telling-the-truth-2018-04-20

http://www.cnbc.com/2018/04/19/whats-behind-the-big-commodities-rally-and-why-it-could-be-just-getting-started.html

http://www.investing.com/news/economic-indicators/philly-fed-index-unexpectedly-rises-in-april-1403175

http://www.investing.com/news/economic-indicators/us-jobless-claims-fall-by-1000-in-latest-week-1403177

http://www.cnbc.com/2018/04/19/apple-nvidia-shares-fall-after-a-key-asian-chip-partner-gives-weak-guidance.html

http://www.cnbc.com/2018/04/19/stocks-making-the-biggest-moves-premarket-pg-bx-bbt-bk-foxa-luv-qcom-more.html

http://www.investing.com/analysis/markets-calm-but-lack-immediate-focus-200306811

http://www.bloomberg.com/news/articles/2018-04-19/big-bad-volatility-complex-loses-bite-as-traders-price-in-calm

http://www.nasdaq.com/article/silver-price-surge-brings-long-term-breakout-into-play-gold-too-cm949949

http://www.cnbc.com/2018/04/19/bonds-and-fixed-income-data-fed-speeches-on-the-agenda-for-investors.html