How Changes in Oil Prices Affect Stock Market

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Kollias et al (2011) use a non-linear BEKK-GARCH model to see how war and terrorism impact the covariance of the price of oil and four major stock market indices (S&P500, DAX, FTSE100, CAC40). They found that war has a long lasting effect on the covariance, whilst terrorist attacks have a one-off shock to the price of oil, the DAX and the CAC, whilst the S&P500 and the FTSE100 were not significantly affected due to the fact that they are more efficient markets and a deep enough to withstand the consequences of a terrorist attack. Their research proves that war/terrorism events are important to look at when examining the price of oil, which in turn affects certain stock market indices and which would have an impact on the share price of multinational oil companies. The impacts that these events have on oil prices are shown in the graph below. For instance, 9/11 clearly increased the price per barrel of crude oil (EIA, 2014). 9/11 is one of the events being evaluated, and I am interested to see if it impacted this super-major share price significantly. d) How changes in the price of oil affect stock market returns In this sub-section, I will look at how changes in oil prices affect stock market returns with reference to academic papers Ready (2012) found that changes in the supply of oil (which ultimately shifts its supply curve causing price to change) have a big impact on stock markets around the world. Ready explicitly highlights the fact that countries that heavily rely on importing oil saw their stock market returns react to greater extent than other countries. Specifically, he mentions the US stock market as one that was affected more than others, which is in line with statistics that show the USA is in fact the big... ... middle of paper ... ...res risk sensitivity of the security to the market, and Alpha (α), which is the average, unexplained return (that is, return not explained by the market). (Weston et al, 2004). Weston et al state that because the Market Model takes into account risk, it is the most commonly used method for Event Studies in general. MacKinley (1997) agrees with this due to the Market Model’s simplicity (it is a one factor model), its linearity and the limitations of multi factor models, whilst also stating it is an improvement on other models. Other Event Studies of a similar nature to mine like Zevenbergen’s paper (2008) on oil spills impacting the stock price of publically traded oil companies use the Market Model to find AR, CAR, AAR and CAAR of each company in a given period. Therefore, I believe the Market Model will be the best model to use for my proposed Event Study.

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