Prior literature reports that macro-economic factors of a country affect stock exchange performance and thus firm performance. Recent strands of literature and the fluctuations in currency have a substantive effect on countries' economies. These fluctuations are also a cause of price fluctuations of imports and exports. One such factor which directly affects firm performance is the oil price fluctuations. Thus, this thesis empirically investigates the effect of oil price fluctuations on firm risk for the firms listed on PSX for the period 2012-2017. Secondary data is taken from SBP, Balance Sheet Analysis Database, Pakistan Stock Exchange and the company's website in some cases. Using Panel data, results show that oil prices increase firm risk (beta), which indicates that market participants react to change in oil prices and thus increases risks. The study indicates that policymakers need to control oil prices to keep firm risk in control and thus manage the market towards a better investment environment.