Research Aim: This research analyses the impact of marriage satisfaction on job performance in high-stress jobs. It will use investment firms in the UK as a case study to analyse how marriage satisfaction affects the performance of men and women working in these high-stress jobs such as trading and investments. Moreover, it will explore various psychological parts of the job affected by the problems in a marriage. Lastly, it will recommend ways to offset the bad effects of unstable marriage to improve job performance.