This book is composed of two different but connected chapters considering the important developments and restructuring dynamics in both worldwide energy markets. In Chapter 1 we used news impact curves which showed that the behavior of commodity prices and company stock prices react differently to bad and good news. Based on our findings in Chapter 1, since commodity returns and company stock returns react differently to both bad and good market news we wanted to go one step further and focused on the price discovery of commodity prices in the market. In Chapter 2 we investigated the impact and integration of financial assets with oil prices. Price discovery of crude oil prices was our first focus area by operating causality tests. Our paper contributes to the energy economics literature focusing on the impact of energy related Exchange Related Funds (ETFs) on crude oil prices. In the previous studies we overviewed so far we concluded that this relationship is studied only between equity markets and crude oil markets.